Manatsu no Eureka

In the early summer of 1979, Ukai, an assistant professor in the Faculty of Science, happens to meet Toki, a graduate student in the Faculty of Letters, who is visiting his seminar room. Ukai falls in love at first sight with Toki's quiet and dignified aura. However, ever since losing his friend Amagata, whom he had secretly loved during his student days, Ukai has been hiding his gay identity and desperately tries to suppress his feelings. One day, when Ukai is troubled by a male student on campus who is stalking him, Toki comes to his rescue. The two grow closer over a meal as a thank you, but then he finds out that Toki was actually a boy who had once adored him...

(Source: MU)