Himenii Is Creepy Old Man

Synopsis

"I don't want to go with some pervy, old bloke...!!" Nanao, a university student, runs a secret account where he takes racy photos and secretly uploads them online. He has a fan called "Hime-nii" who sends him sleazy messages every single time. Although his ass has been trained, Nanao has never actually slept with anyone, so out of curiosity, he decides to meet Hime-nii. To his surprise, Hime-nii turns out to be a handsome, gentlemanly older man—completely unlike what he'd imagined from his messages—and Nanao's excitement skyrockets! "To think I'll be held by someone like this," he thinks, his heart swelling with anticipation. But once in bed, Hime-nii turns out to be a total perverted creep—?! (Source: Kaiohsha, translated)

Anime adaptations