Exactly one year after Seung Jae's death, his girlfriend Soo Ah is grappling with the loss and trying to move forward.
Seung Jae's mother invites his school friends over on the anniversary of his death.
A rumor about Soo Ah spreads like wildfire around the school. Jin Woo looks for work to help support his alcoholic mother.
Jin Woo goes up against the Il Jin guys in the name of Soo Ah's honor and ends up in the hospital.
Jin Woo juggles the responsibilities of a new job with his studies. Teacher Sun Young tries to catch the attention of her colleague, Mr. Kang.
A new student teacher has become very popular with both the students and teachers. Jealous, Ms. Park tries to befriend her students.
Mr. Kang develops an interest in the new student teacher, Oh Hae Ra. Meanwhile, Ms. Park gets set up on a date of her own.
Se In gets wrapped up in his own love affair--and the object of his affection is unexpected.
In order to meet their volunteer requirements for school, the kids do some charity work at an orphanage.
Soo Ah starts receiving mysterious emails from Seung Jae. And after his recent heartbreak, Se In sets his sights on someone his own age.
The truth about Seung Jae and Eun Ho drives a wedge between Eun Ho and Soo Ah. Will they ever be able to move past it?
Many secrets are revealed. The culprit behind the mysterious emails is found out, and Eun Ho finally reads the letter from Seung Jae.
Ah Rang redirects her enthusiasm toward a new love interest. Ki Young's mother gets a strange phone call at work.
Ki Young's mother receives an unexpected visit from an important figure in her past. Plus, Ms. Park tries to help Doo Hyun.
After scoring poorly on their math tests, the kids are forced to hit the books.
Now that he's back in the picture, Ki Young's father is trying to figure out his place in his son's life.
Jin Woo is feeling the pressure to do better in school than Seung Jae did, so he takes on a second job to pay for a private tutor. Ah Rang gets Doo Hyun into more trouble than he's bargained for.
After being kicked off the soccer team, Doo Hyun disappears. Jin Woo tries to help Seung Jae's brother and ends up getting in over his head.
Some English tests are stolen, and Jin Woo gets pegged as the culprit. Could the stress of performing well in school really have pushed him that far?
Doo Hyun returns to school to stand by Jin Woo. Plus, an anonymous tip comes in, revealing those responsible for the stolen tests.
After Jin Woo reveals the details of Seung Jae's death, the circle of friends try to figure out what may have been troubling Seung Jae.
Could Seung Jae's death have been more than just an unfortunate accident? Jin Woo tries to uncover the truth.
Dong Chul reveals some shocking information about the details surrounding Seung Jae's death. Plus, Do Hyun makes his return.