Today around evening time, Natsuo loses his virginity. His accomplice? Her name is Rui and he just met her today after school. Shes the one that raised this entire circumstance, expressing that she needed to just pick up the learning about sex. She wouldnt like to begin a relationship, nor does she think about Natsuo. Thereafter, Natsuo feels remorseful for losing his virginity to a young lady he doesnt even especially like. For the most part, it influences him to feel like he deceived his squash to his secondary teacher: Hina. A peculiar love triangle story unfurls as Natsuo, Rui, and Hina all end up ending up some portion of a similar family.