Kawaikereba Hentai demo Suki ni Natte Kuremasu ka?

When an anonymous love letter arrives in his shoe locker, high schooler Keiki Kiryuu is ecstatic. His dreams of a rom-com-esque confession are quickly shattered, however, when he discovers that the letter contains a pair of soiled panties. Thus begins his strange new quest: to unmask the mystery girl behind the perverse gift, all while navigating a perplexing web of admirers, each with their own peculiar kinks. Keiki's investigation leads him down an increasingly absurd path, as he encounters a colorful cast of characters, both within his school and beyond. From the seemingly innocent to the undeniably eccentric, every girl he meets seems to possess a hidden, and often hilarious, secret. Can Keiki unravel the true identity of his admirer without losing his sanity, or perhaps, even his heart, to one of these delightfully deviant dames?

✦ AI-drafted summary