Description:

"I'll teach you what's bad." As a high schooler, Ayumu's at a sensitive period in her life. She ends up being educated on adult matters by a bearded old man wearing a black t-shirt. (Source: MangaDex)

Alternative Titles:

おじさんが女子●生に悪いことを教える話, Oji-san ga Joshi●sei ni Warui Koto wo Oshieru Hanashi, A Story Where an Old Man Teaches Bad Things to a ●-School Girl, A Story About an Old Man Teaches Bad Things to a School Girl, 叔教女壞, 叔教女坏, Une historie où un vieux enseigne les trucs mals à une ● élève