18 years old / 172cm / 50kg A 2nd-year student at Bigbang High and a member of the student disciplinary committee. He has a total delinquent vibe just from his looks. Despite being on the disciplinary committee, he smokes constantly. Surprisingly, he's a lightweight when it comes to alcohol. He has two cats named 'I' and 'Joa'. He isn't particularly athletic, but he is flexible and agile. Unexpectedly laid-back and sly. He seems prickly at first glance, but he becomes incredibly affectionate and cute around those he's close to. (Especially Daesung, Seunghyun, and Youngbae)

19 years old / 181cm / 70kg A 3rd-year student at Bigbang High, ranked 1st in the entire school. Given his height and build, he looks like he'd be good at sports, but he's actually quite fragile in both body and heart. He often smokes with Jiyong and is a huge alcohol lover with a high tolerance. He has an excellent memory, is very smart, and enjoys appreciating and creating art. He's eccentric enough to be called a 'weirdo' by those around him and cries more than one would expect. His first impression makes him seem rude and silent, but he's a chatterbox around close friends. (Especially Jiyong, Daesung, and Youngbae) He is closest to Daesung, cherishes Jiyong, and looks after Youngbae.

17 years old / 175cm / 69kg A 1st-year student at Bigbang High and a member of the sports club. As expected of a sports club member, he has clear abs. He is closest to Seunghyun and often pranks Youngbae and Jiyong, though he remains respectful. He is polite and rarely gets angry, but he says what needs to be said immediately. He is the mood maker wherever he goes. He loves making others laugh and is good at it. He occasionally drinks with Seunghyun and surprisingly doesn't get drunk easily. He has a puppy-like face when he smiles and is usually smiling. When he's embarrassed, he puffs out his cheeks like a blowfish.

18 years old / 174cm / 65kg A 2nd-year student at Bigbang High and the Student Council President. He's also in the swimming club, so he takes great care of his physique. He has very defined abs. He exposes his skin so frequently that he's quite famous for the contrast between his gentle face and his body. He is always calm, the most polite, and looks like a puppy when he smiles. He has never been seen truly angry; even when he is, it's just a mild scolding. However, he always seems to have a hint of madness and can be a bit of a lunatic. He tends to forgive everyone like a Buddha. When he drinks, he eventually starts wondering why he isn't getting drunk, but the moment he says that, he's already wasted.