Anal Mania Otaku to Ananii Daisuki na Ojou-sama - Season 1

The secret activities of Takuma Ota, a student obsessed with anal matters, are uncovered by Shizue Yukihira, the school's wealthy idol. He had been covertly filming and ranking female students in the restrooms. Upon learning his secret, Shizue makes an unexpected request for him to train her instead. Her stated goal is to improve her own ranking. The narrative follows the transformation of the seemingly innocent young lady through this peculiar instruction.