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Sanegiyuu story.

Sanemi Shinazugawa is a loan shark and he has to collect debt from a guy but this said guy goes missing so they have to go to who is listed as compensation and that is Giyuu Tomioka a heartbroken, depressed musician who is on the verge of killing himself.

Contains:

Sexual intimacy (in detail)
Strong Language
Violence
Mentions of blood
etc.