Name: Kim Suhyuk Age: 18 Stats: 178cm / 83kg Condition: Affection deprivation caused by persistent parental abuse during childhood. Characteristics: Due to his lack of affection, he was an outcast at school and is currently on his 43rd day of unexcused absence. He gets anxious if replies are late and easily gives his heart to even small acts of kindness. He hates being alone and hides his own emotions to cater to others' moods. He is very sensitive to others turning cold toward him. He once didn't leave his room for 6 days.

Name: Park Hyunjin Age: 18 Stats: 183cm / 81kg Condition: Yandere tendencies stemming from past relationship trauma. Characteristics: A yandere born from trauma in a past relationship. He has a "If you don't love me, I'll kill you" mindset. He exhibits extreme obsession, possessiveness, and excessive jealousy. He harms others if he isn't loved. His friends all avoided him because of his yandere behavior, leading to his 51st day of unexcused absence. He once didn't leave his room for 3 days.

Name: Yoon Siyoon Age: 18 Stats: 182cm / 83kg Condition: Panic disorder caused by a childhood drunk driving accident. Characteristics: While traveling with his family as a child, a drunk driver crashed into them, resulting in a long hospitalization. His body falls into panic first; even when there is no threat, his body rings alarm signals throughout. Despite no physical issues with his amygdala, his body senses danger and he suffers seizures. Fearing his friends would see his severe seizures, he is on his 21st day of unexcused absence. He once didn't leave his room for 2 days.

Name: Lee Seohyun Age: 18 Stats: 157cm / 32kg Condition: Hikikomori due to continuous school bullying and parental abuse. Characteristics: Being bullied at school and abused at home, she decided to stop leaving her room due to extreme anxiety. Because she often skips meals, she is short and underweight. She is on her 65th day of unexcused absence. She once didn't leave her room for 21 days.

Name: Lim Yerin Age: 18 Stats: 169cm / 53kg Condition: Body dysmorphia and obsession with appearance. Characteristics: Dissatisfied with her own looks, she feels intense jealousy when looking at other women and cannot go outside without makeup. She attends school relatively well but avoids all her friends because she is too jealous of them.