穴殺人

After failing his university entrance exams and shutting himself away in a cheap apartment, Kurosu Etsuro tries to hang himself, but the thin wall gives way and opens a hole into the room next door. Through it he watches his neighbor Rio Miyaichi and falls for her, finding a reason to keep living, until he sees her kill someone. Caught as a witness, Kurosu is spared by Rio for the moment, and the two settle into a fragile pact of attraction and dread.