Synopsis: Onee-chan no Tomodachi Dakara Te wa Dasenai!

Jiro Ninomiya had a problem. That is, his sister's friends Megu Kurotani and Erika Tenpaku are teasing him about something. Jiro, an adolescent boy, wants to touch their bouncy breasts right away, but if it's just a prank, his life could be in jeopardy, so he puts on a sorry face and tries his best to endure it. However, in reality, both Megu and Erika love Jiro, and it was a deliberate attempt to get his attention. Megu and Erika's temptations become more extreme as Jiro doesn't make any moves... A tactical love affair between two older sister friends who want him to touch her and a high school boy who they think they should never touch. Comedy!!