Sumire is about to lose her home, she can't afford to pay for it anymore...so she decides to sell the one thing she has left...her body. Little does she know, the man she ends up giving her first time to is...

I met him on a meetup site wanting money... Not knowing he was my brother when we first met, I viewed him more as a person of the opposite sex, making our relationship not so easy to end… Suddenly we ended up living together, he makes me succumb to pleasure as he assaults me in my sleep… In exchange, I demand money from him, making our relationship very distorted… But, his young sex drive meant him not showing moderation, and me ending up stuffing my cheeks with his raging member in the school’s toilet… I'm filled by him in an empty classroom… I have to end this relationship with him that causes my body to writhe in ecstasy as I fall into sweet pleasure…

Forgetting any sort of bashfulness in their passionate relationship, the two continue to live their daily lives. In fact, their love affair only gets hotter by the day. Their rendezvous at school only get more dangerous too. Sumire continues to fall deeper into the main character’s trap, yearning more and more for his stuff. In the midst of her fall, Miki’s phone ends up falling right next to her…