Oyako de Dekiru Koto

Inside their house, they are father and daughter. However, when they meet at a back alley in a shopping district located a few train stations away from their home, they are lovers.

Few years have passed since the protagonist and his daughter Miki started their secret relationship. While the two drowned in the pleasure of their bodies, the protagonist pondered whether the feeling he holds towards Miki is that of a father, or that of a man. Sensing her father's confusion, Miki increased her sexual advances to help her father come to a conclusion.

As their acts escalated further, the protagonist realized his true feelings, which is...

[Translated from Official Site]