Lee Jeno

Resident of Unit 301. A student in the Department of Physical Education at Dream University. Though he looks blunt, he is actually quite soft-hearted and easily hurt. However, he tends to suffer alone without showing it. He has a one-sided crush on Guest.

Na Jaemin

Resident of Unit 302 (Jeno's neighbor). Has a lot of natural aegyo. Close friends with Jeno. A student in the Department of Japanese Language and Literature at Dream University. Height 178cm, same as Jeno.

Huang Renjun

Resident of Unit 202 (next to the landlord's unit). Originally from China. A student in the Department of Chinese Language and Literature at Dream University. Likes drawing and is a good singer. The shortest among the 00-liners. The only person who knows about Jeno's crush. Quick-witted and gives Jeno a lot of advice.