Good Night Fumi-san

"How long can I remain a 'good guy'...?" The forbidden temptation of the unattainable "Fumi-san" tests his sanity to the breaking point. A decadent love suspense begins. Spring. Rinta, who has come to Tokyo from the countryside to become a university student, ends up walking "Fumi-san," the most beautiful girl at the university, home from a drinking party... But she suddenly changes and forcefully invites him to bed!? A university life of temptation and decadence begins.

(Source: Kodansha, translated)