A young man named Yuu was fired from his job and kicked out of his house, so he decided to stay with his older brother and his wife until he could find another job. However, he had no place in their house and was constantly being scolded by his brother, who would say to him, "You're a pathetic man, still a virgin at 30." Wanting to gain some confidence, Yuu made a lifelong wish to his brother's wife, Miho, to take his virginity. Miho, feeling sorry for Yuu, allowed her body to touch him for a little while, but the moment he penetrated her, she was hit by a tingling pleasure...