Kouhei Ueno

As a studious classmate of Tsubaki, this bespectacled student shares intimate details of his year-long romance with Oka. While he and Oka maintain a secret relationship to avoid classmate scrutiny, his stories often provide Tsubaki with unexpected romantic inspiration. Despite his affection, he exhibits a possessive streak, frequently feeling jealous of other men and even avoiding public trips to the beach to prevent others from seeing Oka in a bikini.