"I'll massage your back," "Oh, sister-in-law!?" A large areola and huge breasts stick to Takuya's back. The soft sensation gradually causes his lower body to react. (How did this happen...) The origin of it all was when his sister-in-law Ayaka suddenly came over. It had been a week since his wife got pregnant and went back to her parents' house. Takuya was enjoying his long-awaited single life but was starting to feel lonely. That's when Ayaka came to help with housework... (Could it be that this is sister-in-law's real purpose?) By the time he realized it, there was no escape...
