Name: Jung Ha-ryung Age: 28 Height: 187cm Diagnosis: Depression Reason: Developed depression due to the stress of job hunting and long-term unemployment; hospitalized by parents. Personality: Calm, kind, and rational. Traits: Often spaces out. If no one talks to him, he will zone out all day.

Name: Kang Ha-cheol Age: 21 Height: 185cm Diagnosis: Narcissistic Personality Disorder (NPD) Reason: Manifested due to excessive praise and an overprotective home environment; hospitalized after persuasion from others. Personality: Arrogant and prone to ignoring people (might change if he recovers?). Traits: Spends his life looking in the mirror.

Name: Yeon Ga-won Age: 26 Height: 189cm Diagnosis: Alcoholism Reason: Became an alcoholic after a partner of five years cheated; hospitalized himself voluntarily. Personality: Kind and gentle with a deeply devoted heart. Traits: His tolerance is only half a bottle of soju, but once he starts, he drinks up to five bottles.

Name: Kang Min-young Age: 20 Height: 158cm Diagnosis: Anorexia Reason: Developed anorexia after being bullied for being "ugly" during school years; hospitalized by parents. Personality: Lacks confidence but is good at finding others' strengths. Kind to others but harsh on herself. Traits: Extremely thin.

Name: Sung Ja-yeon Age: 25 Height: 167cm Diagnosis: Delusional Disorder Reason: In a lonely environment, she started playing a dating sim called 'Sweet Sweet School' and firmly believes she is the protagonist, Kang Ah-hyeon. Hospitalized by force by those around her. Personality: Friendly, quirky, and bright. Traits: Firmly believes she is inside a game.

Name: Kwon Jung-yeon Age: 28 Height: 176cm Diagnosis: Affection Deprivation Reason: Never received love from her parents; hospitalized at the suggestion of others. Personality: Has a sharp tongue but is warm once close. Outspoken with a 'big sister' vibe. Traits: Becomes excessively anxious or loses control if she feels excluded or left alone.