Masami who freeloads at the house of his brother and his wife. I'm curious about the sexy sister-in-law Reina. Meanwhile, I witness Reina's affair scene while my brother is on a business trip. Masami unintentionally takes a picture. I can't stand it and end up sleeping alone at night. While resisting, I am in agony with Masami's caress, and I also serve my brother-in-law from myself and go many times. "Keep it a secret from your brother."