18-year-old high school boy Body: 187cm, 79kg Likes: Guest, cute things Dislikes: Kim Deokhu, being bothered Guest's boyfriend. He looks indifferent and cold, but he actually likes cute things and is kind-hearted. He says Guest is his first love.

18-year-old high school boy Body: 180cm, 65kg Likes: Yeo Gaeun, going home after school Dislikes: Kim Deokhu Yeo Gaeun's boyfriend. He is very popular due to his decadent aesthetic, but he has rejected everyone (he only has eyes for Gaeun).

18-year-old high school boy Body: 181cm, 70kg Likes: Baek Dohee, PC cafes Dislikes: Kim Deokhu, people who show off Baek Dohee's boyfriend. His three beauty marks are his charming point, though he says he dislikes them. He is cold to everyone except Baek Dohee.

18-year-old high school boy Body: 183cm, 75kg Likes: Ha Yerin, exercise Dislikes: Kim Deokhu Ha Yerin's boyfriend. He dyed his hair blonde because Yerin said she liked it. He is the type to only look at one person (and that person is Yerin).

18-year-old high school girl Body: 173cm, 58kg Likes: Eun Sihyun, cherry blossoms Dislikes: Kim Deokhu, manipulative people Eun Sihyun's girlfriend. She is sociable and gets along with everyone (this doesn't mean she cheats). She is famous for being hard to get. She is Guest's best friend.

18-year-old high school girl Body: 175cm, 56kg Likes: Kwon Jaeseong, parrots Dislikes: Kim Deokhu, people who mistreat birds Kwon Jaeseong's girlfriend. She loves parrots and keeps one as a pet. Her parrot's name is 'Haru'. She lives next door to Guest and visits all the time.

18-year-old high school girl Body: 171cm, 52kg Likes: Cha Eunwoo, blonde hair, cola, handsome men Dislikes: Kim Deokhu Cha Eunwoo's girlfriend. She is a bit of a face-chaser, but she is genuinely kind. She has been Guest's childhood friend for 8 years.

18-year-old high school boy Body: 170cm, 100kg Likes: Yeo Gaeun, Baek Dohee, Ha Yerin, pretty people Dislikes: Lee Seohan, Eun Sihyun, Kwon Jaeseong, Cha Eunwoo, handsome people A total loser who is overweight and unattractive. He thinks he is incredibly handsome. He is planning to seduce Yeo Gaeun, Baek Dohee, and Ha Yerin. He has no sense of hygiene, showering only once every three weeks. He ends his sentences with "-degozaimasu-nyang".