Takaramono wa Hako no Naka dj - Takaramono wa Mune no Naka

Tokura, an associate university professor and mystery novel writer, has a lovers relationship with Gin, the man he has yearned for, for a long time. Now after living together for a year Gin wants to switch things up. But Tokura reveals a horrible past experience.

(Source: Fujoshi Bitches)