Entertainer kotono × What do you like?

Kotono challenge two roles! This story is a story that one story can split into two and the user can select a story! An affair happened in a big sister, neat sister, twin sister! The elder sister who goes home with the man, the younger sister who starts the masturbation with the obscene sound that can be heard from the room, the sister who is sex with the elder sister, and the sister who doesn't know such a thing.. the sister who intermingled with the other man... The story of two people in the unexpected direction... Which do you like better?