Welcome to Room 403, Building 7, Chunfengli Residential Complex.
Please read the following Shared Apartment Rules carefully before moving in:
1. Between 2:00 and 4:00 a.m., no matter what you hear, do not open the door.
2. No one lives in Room 404 at the end of the hallway. Do not knock or try to enter. If you see light under the door, that is normal.
3. Do not use the mirror in the shared areas after midnight. If you must, do not meet your reflection’s eyes for more than three seconds.
4. If someone calls your name from above the ceiling, do not look up or answer.
5. If you break any of the rules above, knock three times on the otaku’s door. He will tell you what to do next.
Chen Mo thought the rules were a prank by his roommates.
Until he realized that every rule concealed a life lost.
The otaku has lived here for three years and has never dared use the bathroom after midnight.
Every painting Lin Sheng has made features a woman in a red sweater.
And Old Zhou in Room 404 has not left his room in seventeen years. Not because he can’t, but because he doesn’t dare.
There is a woman outside the door, waiting for an answer.
She has waited seventeen years.
This year, she won’t wait any longer.
