A gray and white kitten with black stripes wanders away from her mother and siblings one day while enjoying a walk outside with her family. Lost in her surroundings, the kitten struggles to find her family and instead is found by a young boy, Yohei, and his mother. They take the kitten home, but pets are not allowed in their housing complex, they try to find a new home for the kitten. This proves to be difficult, and the family eventually decides to keep the kitten, naming her "Chi".
Chi is a sweet playful kitten who's always full of energy. She gets yummy milk from Yohei, and is relaxing at home all nice and full. As she searches around the house for something exciting, she comes across Yohei walking with a handful of rubber balls. The ball goes bouncing everywhere as he drops them, and Yohei and Chi can't get more excited, but... The day ends with Chi and the family making a great memory together.
Early in the afternoon, the sky has cleared up. Chi comes back from her walk. As she goes into the house with her dirty paws, right there in front of her appears a brand new carpet. Mom and Yohei desperately tries to stop her from walking on it, but she is a kitten after all; she won't listen. Mom and Yohei runs after Chi. Another exciting day at the Yamada residence begin
Chi takes lessons from Bear Cat. She learns how to hide, jump from higher places, and so on. The Master, Bear Cat, personally teaches Chi how to truly protect oneself. She stands up to a big dog, she elegantly climbs up a wall to avoid a car... well, so she tries. The third episode of the series is, once again, full of cuteness!
A sweet and yummy scent comes wondering from somewhere in the house. It's... Yohei's pancakes! Chi discovers the yummy taste for the very first time, and she sets out to search for more tasty stuff. She finds dad's coffee, a fresh whole cabbage, her own usual crunchy stuff, etc. And for dinner is cheese fondue, which the Yamada family enjoys together as a loving family, with Chi of course.
It's Halloween! As Yohei and his friends from the neighborhood dress up, dad buys a bunny costume for Chi as well. Dad tries ever so hard to get a photo of her wearing it, but cats hate clothes and Chi freaks out. The next minute, the light goes out due to a power cut... When the lights come back on, dad's given a great present from Chi.
Chi always follows mom around the house. Once mom starts cleaning, Chi is sitting everywhere she goes. Mom is a little fed up, but dad is jealous. Dad desperately wants to become a more important person for Chi, and decides to groom her. Chi loves it, and dad and Chi becomes closer buddies... but the next minute, a more attractive rival comes into the picture!
Chi and the Yamada family go camping on a fall holiday weekend. The camping site where they can see Mt. Fuji is beautiful in its autumn foliage. The great outdoors is full of interesting things like swarms of dragonflies coloring the sky and a carpet of fallen leaves that rustles under their feet.
Further inside the camping site is the picturesque Maple Falls. Dad appoints Yohei cameraman, so he heads off to the waterfall with Chi to take pictures. Along the way, they encounter scary animals, dead ends, and more. But together, they overcome each obstacle to create a wonderful memory. An adventure with just the two of them. It's the second half of the family camping trip.
Many children and families are enjoying their time at the park. Chi has come on a walk by herself as usual and meets the spiteful looking kitten, Come-Come. Come-Come always clicks his tongue and acts cold, but they race, chase lizards, and have twice the fun they usually have alone at the park. The meeting of the two little kittens becomes a memorable encounter.
A parakeet has come to the Yamada household. They're going to take care of it for a few days while a neighbour is off traveling. Chi is intrigued by the cute parakeet that can speak like humans and say "hello." Yet, as tiny as Chi is, Chi is still a cat. Dad, who was looking after the two, had to leave the house on urgent business. Left alone at the house were just Chi and the parakeet.
At night, cats let a different side of them come out. Chi follows Black Cat who was just passing by Chi's yard and arrives at the park at night. From the darkness quietly approach several grown-up cats. As the moon appears, the cats rise to their paws! Rocking to the rhythm of the chirping bugs, it's time for a dance party exclusively for cats!
Chi leaves the park at night with Come-Come. Come-Come says he'll take Chi to "a nice place," and they head off on a walk through the dark city. It's Christmas Eve. The illuminations in the yards are a perfect place for kittens to play. They enjoy looking at the pretty lights, but that's not all! With these two mischievous kittens, even a quiet holy night becomes a great adventure.
It's Christmas morning. Chi wakes up outside of the house. The Yamada family doesn't have a clue that Chi was out the previous night, and they don't notice her not being inside the house. Chi is sad that nobody notices but finally the one person who's always there for her notices! Chi is welcomed home with a warm breakfast and lots of hugs. It's the best Christmas present of all.
One snowy day, Chi is taking a nap in the heated room. Then all of a sudden, the electricity goes down. The room becomes colder by the minute. Chi and the Yamada family try to do exercise to warm up but does not work. They all look for a place to snuggle and warm up, and they find...
It's "Chi Takes Lessons" the second time around. Chi takes lessons from the mighty Bear Cat once again. One fine day, Chi is out walking, when she bumps into Bear Cat who's hunting.
Chi notices the nice clicky-clack noise coming from Dad's keyboard. Dad's deadline is approaching but he's disturbed by Chi over and over. Chi "helps" Dad, who's struggling to come up with new ideas for his design! What a great help she is.
Chi is spending another happy day, surrounded and loved by the Yamada family.But Bear Cat tells Chi that in order to continue living this happy life, she must live more elegantly. And so it's Bear Cat's lesson time, once again. Chi learns how to act even cuter than usual.
Chi is enjoying some snacks with Mom on the couch. As they enjoy the relaxing time, Mom suddenly realizes that she has gained a little weight. She rolls up her sleeves and starts doing exercises. Back in her college-days, Mom belonged to the tennis club, and was known as the star player, "Fire Angel Miwa." The one who stands up to coach Mom is none other than... Chi!
Bear Cat is the boss cat of Chi's town. He watches over the streets to protect the peace and security of the citizens. As he patrols the park, he sees lots of cats such as Chi, Come-Come, Old Lady Calico, Ann, and Telly having fun. The daily goings at the sunny park are peaceful, yet full of little adventures. In this episode, Bear Cat is the main character.
Chi has finally come to the cat meeting. It's a festival held every year just for cats. Chi and Come-Come are thrilled to be here for the first time. Night falls, the moon shines, and the cat meeting begins. Cat DJs, cat singers, and the smooth dance moves of Bear Cat! This exciting night of dance and music is a secret world of cats that no human knows about.
Chi notices that the air smells a little different today. She meets the stray cat Come-Come again, and he tells her that it's the smell of rain. Memories drizzle down on the kittens as they take cover from the rain under a little flower pot. They're memories of Come-Come's sad and lonely past. But the fluffy warmth of each other gently bring the two together just a tiny bit.
The rain has gone, and Chi and Come-Come resume their walk. They discover a piece of fried chicken on the glistening street. Chi, who loves food, pounces on it and gulps it down, but it had a strange smell to it... Everyone watches over Chi, in both sickness and in health. Chi grows up little by little, surrounded by the kindness of her friends.
Chi is playing with Yohei, as usual. But for Chi, it's more fun to pull the blocks down rather than build them with Yohei. Though Chi and Yohei have their own distinguishing ways to play, they always enjoy each other's company. Even with Yohei's favorite balls, Chi finds her own way to play with them. Chi and Yohei sometimes fight over snacks, but at the end of the day, they're simply inseparable.
Yohei brings home frogs. Chi is excited, but Mom is furious. She tells Yohei to take them back to the park immediately but the frogs escape from the box and it’s chaos inside the Yamada household. To find the frogs, Sherlock Yohei Holmes and his assistant, Chi, sets out to go find them. Will they be able to get the frogs back to the park?
A scene seen in a dream... A memory treasured deep inside the heart... Chi wakes up and finds Come-Come in the park. As they hunt and play together, cherry blossom petals come falling from up high. Come-Come senses someone looking at them. Spring has arrived. It’s time to make some new friends!
Chi and Come-Come are playing in the park, and there come the siblings Ann and Telly. They quickly become friends. The park is fun just with Chi and Come-Come, but now with the four of them, it's even better! From the kittens' point of view, the park is filled with "amazing" stuff. Chi's sweet adventure continues, now with more friends on board!
Chi heads to the park to find Come-Come. There, Come-Come was actually waiting for Chi! The two decide to step outside the park, to go on a great adventure. Once past the small hole that only small kittens can pass through is a brand new world filled with new mysterious things. With a little bit of courage, new experiences will come your way. It's spring. Why not take a great step forward?
Chi is going to participate in the "Beautiful Cat Contest." Dad is all excited and confident that Chi is going to win. He tries to film Chi acting all elegant, but she isn't quite that... Meanwhile, Mom notices the ad for the "Funny Cat Contest" and decides to enter her to that as well. It's Dad versus Mom. Who understands Chi's charms the most?
It's another happy day for Chi. Chi and Come-Come are taking a stroll together and Come-Come notices how Chi is getting all the attention with her glorious smile. When Come-Come is with Chi, many good things somehow come his way... This is the first ever episode focusing on Come-Come and his road to discovering how smiling leads to many good things!
Chi is taking a nap in the warm day light. Chi is dreaming about all the yummy stuff that she has been given by the Yamada family; milk, the yummy munchies, the little bites of pancake that she is sometimes given... not to forget the feasts that Mommy prepares on special occasions. Enjoy this episode that recalls all the great past scenes.
Little Yohei was looking forward to going camping with Mom and Dad, but last minute work stuff comes up and Dad needs to cancel. Dad tells Yohei to be a good boy and accept the situation, but Yohei is upset. Yohei decides to leave home. As he leaves, Yohei can't help but to feel a little excited of the "adventure." It's Yohei's first "vacation" on his own.
On a night when spooky winds blow, Come-Come is woken up by a strange voice saying "I'm Chi..." The next morning, Chi, Come-Come, Ann and Telly find a mysterious feather in the park. Who does it belong to? As they go find the owner, the sun goes down, and again, the strange voice "I'm Chi..." is heard. It's a hot summer mystery!
Chi and Yohei is playing hide and seek. Hiding is fun! Searching is fun! Being found is fun!! The two run around the house to look for places to hide. Chi finds the perfect place. She hears Yohei walk away and she feels confident that she is going to win, but... Who's the winner? Chi or Yohei? Find out in this fun episode.
Chi and Come-Come meet up to play together, but they end up fighting. Who comes to the rescue but Bear Cat. He gives Chi and Come-Come lessons on communicating with one another!
Yohei has caught a cold. Mom tells him to stay in bed but Chi and Yohei really wants to play together. Chi tries to get into Yohei's room in every single way thinkable, but will she get past Mom? It's Chi and Yohei's sweet adventure, inside the Yamada residence.
Chi, Come-Come, Ann and Telly eavesdrop on Bear Cat and Old Lady Calico talking about a secret only adults can know about. Apparently, there is an unheard-of delicacy one can have at the "house of flowers." It's a dangerous place, where kittens must never set paw in. Of course, the kittens waste no time and set off to find the place. The 4 kittens are off on a great adventure!
Chi, Come-Come, Ann and Telly are off looking for the "house of flowers." At a junction of 3 roads, the 4 get separated as they are chased by a big dog. Ann is feeling down, as her mother always used to tell her and Telly to never lose sight of one another. This is the time where friends must work together to get through this situation! Find out how the 4 kittens' great adventure ends.
Chi is playing in the garden, after the rain is up. The sky is clear blue and the frogs have come out. The grass is performing a song, along the beat made by the dripping water. The frogs are dancing. After Chi plays and dances away with them, she takes a little break and sees a familiar face up high in the sky. It's a day filled with things Chi likes to do.
Chi and Come-Come gets a fresh fish from the little restaurant they always go to. They both can't wait to eat it but they notice adult cats staring at them. The adult cats come after the fish, and they seem very different from how they always are... Chi and Come-Come run as fast as they can but they are caught. Will the two get through it, by joining forces?
Summer vacation is finally here! Chi, Yohei, and Mom head to the park together to catch some bugs. Yohei has his eyes on beetles. Mom, who surprisingly was a great bug catcher as a child, teaches Yohei how to catch them. There are all sorts of exciting bugs in the park! A while later, Dad brings a trap made to catch the beetles. They leave the trap in the park and go check it out after dinner...
Dad finds a bunch of old toys that brings back good old memories. A cup-and-ball, hula hoop, ring toss, yoyo... They're actually really fun to play with! Chi falls very much in love with the toys as well, and she starts to play with Dad. She runs after the toys, jumps at them, etc... Yohei and Mom can't help but to join in and before they know it, the four are having a blast!
Chi is taking lessons from Bear Cat in the park. She is learning how to hiss. The aim is to scare off the opponent but the minute Chi hisses, it's cuteness galore! Bear Cat does everything he can to teach Chi how to scare animals off. Will he succeed in making Chi the master of hissing? It's yet another episode of the fun "lessons" episodes.
Bear Cat is thinking back on all the lessons he has been giving Chi. He has been looking out for her and teaching her so that she can become a fully-fledged cat. In this episode, we look back on all the cute scenes. Chi also visits the production where "Chi's Sweet Adventure" is produced. She jumps right into the real world and finds out how Animes are made.
Bear Cat is yet again, thinking back on all the lessons he has been giving Chi. In this episode, we look back on more cute scenes. Chi also heads to Paris to attend the "Japan Expo" as a guest. She checks out the Eiffel Tower, the River Seine, a very fancy department store, etc... Chi enjoys the real world again!
It's sizzling hot and it is wearing Chi and Come-Come out. They head to the park to find somewhere cool but all the shades are taken already by the adult cats. They bump into Ann and Telly, and the four head out to find a cool place together. They ride a skate board, follow a kind-looking man to walk along his shadow, and so on but they can't find a place to cool off.
Yohei is drawing a picture diary for homework over summer vacation. As he looks around for something fun to draw about, his eyes land on Chi. "That's it! Today, I'm going to write about Chi." Chi loves to eat and be brushed. But as Yohei follows Chi on her walk, he realizes there's another side to Chi that he'd never known before. Yohei finishes a cute observation diary of a little kitten.
Chi, Come-Come, Ann, and Telly are having fun at the park. The kittens are great at discovering new things. They find the perfect spot shining in the sunlight on top of a great tree. The four kittens climb to the top to discover a mysterious contrail stretching out before them. What can be at the end of it? An amazing place just for kittens to play awaits them!
Chi and Come-Come are practicing how to tip-toe in order to catch their preys, when they find Bear Cat taking a walk. They try to follow him without him noticing. Bear Cat is the leader of all cats in the neighborhood. But, Chi and Come-Come find out for the first time that, him being big and wise is not why he is considered the leader. It is because he protects the kittens with a big heart.
Mom and Dad are fighting. Yohei can't help but feel shocked, as they usually hardly fight. Yohei goes to his room. Chi, on the other hand, wants to play with the Yamada family as usual. But nobody is answering. Just what is going on? The house suddenly seems somewhat dark and cold. And so Chi leaves the house, to go find Come-Come...
Chi leaves the Yamada residence that felt all "cold" and joins Come-Come to go on a walk under the moonlight. The two sleep together, all squished inside Come-Come's little cardboard box. After talking to Come-Come, Chi decides to head back home, to make the house feel nice and warm again. She goes straight back to home sweet home, back to where the Yamada family lives.