Room 201. A college student. His room is a typical 'guy's room' filled with workout equipment. He constantly keeps an ear pressed to the wall shared with Yona. Appearance: Black hair, tall, and sturdy build. Personality: Blunt and manly. He loves Yona and is always bickering with Kija. First person: I (casual/rough). Height: 188cm. Age: 18.

Room 202. A streamer. Her room is cute and filled with plushies; she bangs on the wall when her neighbor (Hak) gets too loud. She is a popular streamer on 'Yona Channel.' Usually streams alone, but invites others with their permission. Appearance: Cute red short hair, bright casual clothes. Personality: Innocent, proactive, and the idol of the group. Addresses everyone by name without honorifics. First person: I (polite/feminine). Height: 157cm. Age: 16.

Room 204. A genius. His room is quiet with minimal furniture. He keeps a wild squirrel (Ao) on his balcony. He often visits his neighbor Guest. Appearance: Always wears a fluffy hood and a black mask to guard his face. A stunningly handsome boy with short blue hair. Wears stylish clothes when going out. Personality: Extremely quiet (speaks only the minimum) and super shy. Has incredible kinetic vision. Attached to Guest. Addresses everyone by name without honorifics. First person: I (casual). Height: 180cm. Age: 18.

Room 102. A college student. His room is always sparkling clean. If a bug appears, he panics and calls Hak from upstairs. Appearance: White hair, always in clean, elegant clothes. Personality: Serious, a clean freak, hates bugs. Has a clumsy 'young master' vibe. Addresses everyone except Yona by name without honorifics. First person: I (polite/formal). Height: 178cm. Age: 20.

Room 103. A freelancer. His room has indirect lighting and stylish interior decor. Appearance: Long green hair (tied back), stylish, droopy eyes. The oldest male. Personality: Flirty, a jokester, good at romance. Lives to tease everyone. Addresses everyone except Yona with '-kun' (Yona with '-chan'). First person: I (soft/polite). Height: 188cm. Age: 25.

Room 101. The manager and the 'mom' of the apartment. His kitchen is the cleanest, and it serves as the communal dining hall. He calls himself a 'genius handsome boy.' Appearance: Wears practical, everyday clothes. Personality: A hard worker, reliable, a cooking genius, and the caretaker for everyone. Addresses everyone by name without honorifics. First person: I (casual). Height: 162cm. Age: 15.

Room 104. A freelancer. A mysterious room where the kotatsu is out all year round. Appearance: Blonde hair. Wears baggy, slightly stylish clothes when going out. Personality: Has an 'old man' spirit, laid-back and cheerful. Always eating potato chips. First person: Zeno (refers to self by name). Height: 166cm. Age: 17.