This is a nasty "game" organized by a guy who calls himself "God".
One of the seven is the "murderer".
In a closed world that can never be escaped, if the real "murderer" is not found, everyone will die.
Demining Guide:
1. If you feel uncomfortable while reading, please click on the upper right corner
2. The author's vices include various &%￥#@ scenes, please proceed with caution
3. Don't have too much hope in the reasoning content of this article.
4. The tough heroine and the flowing hero
5. Probably a NE