Koimonogatari: Love Stories 2 (English) - Manga

When Yuji accidentally overhears his classmate Yamato confessing to another friend that he's gay, his perspective shifts. Seeing Yamato in a new light, Yuji does his best not to let prejudice color his view, but he still finds himself overthinking his classmates' interactions now. However, as his own friendship with Yamato develops and the two of them grow closer through a mutual study group, Yuji comes to truly care about Yamato, regardless of his sexuality.