A-Sized Classmate

Fuente: AniList

A group of school children who are studying a group together to help two friends who are below average. But when Riko comes home first, only Nao is alone in the room and also with his two male friends. In the middle of talking about pervert things, they began to wonder with a real sense of sex. (Source: Nekopoi and Has Been Translated and Edited)