Kagirinaku Game ni Chikai Honki

Innocent Hori Keiichi is suddenly approached by his younger co-worker Takasuga… and he confesses his love! At first Hori takes him lightly, but after much aggressive persistence from the other, he realizes it's for real. Hori gives in and they start to become lovers. One day, Hori decides to visit Takasuga's apartment and what he sees is a wet and half-naked man… who happens to be his evil brother Keiji! What is he doing in his lover's apartment and how do they know each other?