My mother is a little overprotective and my sister is a little brother complex. I was happy being surrounded by these two big-breasted girls in my daily life. Ryota comes to Tokyo every year for his exams. He says he wants to be a doctor, but he's just a fool. He's already old enough to be a good boy, but he's a joker and good at getting along with the people around him, and I hate him. But my mother and sister are always with Ryota every time he comes to Tokyo. I was feeling gloomy thinking that they would do whatever they wanted in this house for three days, but I never imagined that this time they would do whatever they wanted with my mother and sister's bodies. What's more, Ryota has a huge dick that I've never seen before! Seeing my mother and sister becoming addicted to his big dick in an instant... I couldn't stop masturbating even though I was angry.