Koisuru Boukun

Tetsuhiro Morinaga has loved his older colleague Souichi Tatsumi for years despite Souichi's volatile temper and openly hostile attitude toward homosexuality, making Morinaga's confession seem almost hopeless. Even so, he remains close, trying to control his feelings while preserving the academic and personal relationship they already have.

Their relationship changes after an incident pushes them across boundaries neither was prepared to handle, leaving consequences that make it impossible to simply return to the old friendship. Morinaga wants mutual love rather than physical closeness alone, while Souichi is forced to confront feelings that conflict with the identity he has built for himself. Every step between them becomes a struggle involving desire, denial, and the boundaries they must learn to respect if they are to continue.