[Reducing Mosaic]ADN-725 A record of incestuous sex between two siblings who live off the money left by their parents. Kashi Hikari.

My brother has been a shut-in since he was severely bullied at school. My mother couldn't abandon him and eventually even started helping with his sexual needs. Then, suddenly, both of my parents died in an accident, leaving just the two of us to live together. As usual, my brother who keeps shutting himself in his room demands that I handle his sexual needs instead of our mother... I'm sick of it... Even though I think this, I can't abandon him... It's just a twisted codependent relationship... Today too, we fall into debauched intercourse.