[WAAA-226] My sister was Impregnated by the Yakuza, She Was Confined As A Substitute For Me And they came inside her Until She Got Pregnant. Ai Sayama

The protagonist has wronged the Yakuza by being unfaithful, and they demand repayment.

It is settled that he has to summon his older sister Ai Sayama, so she can make things right with her body.

Things get intense and crazy real fast, to the point the lil’ brother is forced to fuck his sister.