The Strange Invasion

Single protagonist + no heroine + escape + horror and suspense

[The Strange Invasion]

[1: Keep an eye on the time on your phone, and try to hold out until six in the morning.]

[2: They cannot be trusted. You can only trust yourself.]

[3: Unless it is an emergency, do not open doors to even-numbered rooms. If you need to rest for a while, you may enter an odd-numbered room.]

[4: Odd-numbered rooms are not safe. If you stay too long, it will notice you.]

[5: If you encounter a supernatural event, flee as quickly as possible.]

[6: If you lose track of time, disregard Rule One and find another way to escape.]

[7: This is a boys' dormitory.]

[8: There is no basement level. If anyone tries to take you to the basement, stay away from them.]

[9: If you have already reached the basement, do not look back. Keep going down.]

[10: If you hear knocking, do not open the door or move. Close your eyes and count silently from one to sixty.]

[11: If you have already opened the door twice, get to the basement as soon as possible. Keep going down.]

[12: If you cannot find an exit, disregard Rule Five and face them head-on.]