Fushidara Gensoukyou Room Share ~Uwaki mo Netori mo Saimin mo~ (RJ01730150)

Due to an anomaly, the entire mansion is sealed, and for thirty days until the seal is broken, you cannot leave.
The only people trapped are you, an outsider, and four girls: Reimu, Marisa, Sakuya, and Sanae. And another outsider, a man—your rival.
The seal also suppresses the girls’ powers; you cannot fly, and your magic is ineffective.
There are six time periods in a day. Move between rooms and talk to, compliment, help, or invite the girl you encounter.
Both the heroines and your rival will move one step at a time with each move you make.
Your rival will target a girl, seduce her, get her drunk, take her back to her room, and try to overpower her if he sees an opportunity.
Clues to what he’s doing can be found in eyewitness accounts, leaks of sound, traces in the room, rumors, and peeping.
“Who you meet today” directly determines “what you miss.”
There are over 10,000 lines of dialogue per character. Multiple endings await depending on who you end up with, who you lose, who gets pregnant, and who you return home with.