Oji-san ga Joshi●sei ni Warui Koto wo Oshieru Hanashi

Also known as: おじさんが女子●生に悪いことを教える話, 叔教女壞, 叔教女坏, 叔叔教女●中生做壞壞的事, 叔叔教女●中生做坏坏的事, 아저씨가 여고생에게 나쁜 짓을 알려주는 이야기, A Story About an Old Man Teaches Bad Things to a School Girl, Дяденька плохому •• научит

by Haru Hisakawa

"I'll teach you how to be a bad girl." 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.