Riho Sasakawa and Rui Hizuki's first co-star! !! I was having a happy life surrounded by two proud older sisters. One day, my sisters are noticed by a locally famous DQN senior ... From the next day, older sisters who are compliant and devoured every corner of their bodies to help me from DQN who goes up to the house and violently violently. Even though it's regrettable and unpleasant, strange emotions gradually come from the bottom of my heart.