Kazuya is visiting his brother's house during summer vacation. He is excited to meet his brother's wife Kana, whom he has always admired, but that night, he sees her masturbating alone. Her lewd and indecent behavior brings back the feelings of love he had almost given up on, thinking that she would be living a happy married life with his brother. The moment his brother goes off to work and they are left alone, the passion he has been suppressing for years overflows and he attacks Kana.