Tsuda Takatoshi is about to begin his first year in Ousai Academy. His decision to enter Ousai was based upon it being close to his home and he paid no heed to the fact he'd be among the first boys to enter the recently gender-integrated school. On his first trip to school, Takatoshi is surrounded by girls; the train has nothing but girls, the walk to school has nothing but girls and once he finally arrives he is approached by a group of girls and summarily appointed vice-president of the student council and, as expected, he is the only boy there. Now Takatoshi finds himself surrounded by crazy girls who do nothing but horrify him with their candid conversations about feminine hygiene products and, what's worse, assume he's the worst kind of man, the kind who doesn't clean himself and watches porn all day long.
Takatoshi Tsuda, on his first day of high school, is recruited to join Ousai Academy's student council as the vice president. Shino gives him a tour of the school. They go over some school rules and start a suggestion box. Hata interviews Shino for the school paper, but the process seems to resemble that of an eroge.
Mutsumi asks Takatoshi for help in getting a judo club established. Takatoshi asks the girls for tutoring help. Yokoshima-sensei is introduced. The council cleans out a classroom full of storage materials. Aria worries about night stalkers.
Shino and Aria go to Kyoto for their class trip. Takatoshi tries to get his council work done but is distracted by Kotomi's requests. Suzu invites Takatoshi over.
Shino returns with gifts for the gang. Topics include melon bread, milk, hot weather and counseling, The council celebrates Shino's birthday. Afterwards, Takatoshi shares an umbrella with Shino.
Takatoshi has a cold and receives a visit from Shino, whose activities are misinterpreted by Takatoshi's sister Kotomi. Later, Shino must honor her commitment of being photographed at the swimming pool. Aria asks Shino for advice on a crush she has. Yokoshima tries to trap Takatoshi in a classroom. The council makes a web page.
The council investigates some of the scary school legends. Yokoshima shows the council a porn magazine she confiscated. The council visits Mutsumi's judo club. Shino gets the hiccups. The council prepares for a day at the beach.
The council spends a day at the beach, and a night at an inn.
The council plans events for sports day. Suzu visits Takatoshi's house and meets Kotomi. Shino is scared when a bug flies into the room. Discipline Committee head Kaede Igarashi confronts the council about their activities at the inn. When one of the judo members gets injured, Shino volunteers to take her place.
The council prepares for sports day. Takatoshi writes a surprisingly touching story. The council participates in various sports day events for their class, and then as a team for the final group relay.
The council visits Aria's home and meets her maid Dejima. Takatoshi sees school reporter Hata on her daily activities. The school conducts a cultural festival.
Takatoshi helps Kotomi prepare for the Ousai Academy interviews. Random gags about the cold weather, and misunderstandings. The council cleans up the club room, and then celebrates Christmas at Aria's vacation house.
The student council celebrates the new year. Yokoshima catches a cold. Takatoshi receives chocolates for Valentine’s Day. Kotomi does her entrance exam and interview for Ousai.
The council visits the robot research club. More daily school life gags. Kotomi walks to school as the credits roll. The council recaps highlights from the series with a bit of revisionist history.