好きだった年下幼馴染が誰とでも寝ている件

Aika, a girl who is living next door to me
Since our families are in a good relationship, we grew up like brother and sister
Aika is cheerful, cute, and kind to everyone
but she is mean to me, maybe it is because we are like family
But I can't see her as a family member
Because I started to like her as a girl

"You did with your senior didn't you?"

"Yeah, I did. what is the problem? I didn't trouble you right?"

"Oh, perhaps you also want to do naughty things with me?"

It is a story about you and your childhood friend who became a sexual beast and sleeps with everyone.

source: Translated from Offical Website