Koji, who lives with his brother and his wife, happens to see his brother’s wife changing clothes. The slender body of his brother-in-law, Kanna Arihara, who burned into his brother-in-law’s eyes, captivated him and bothered him. Koji, who can’t stand the forbidden desire, steals Kanna Arihara’s underwear and indulges in masturbation … However, the scene is found by Kanna Arihara … What action did Kanna Arihara take at that time?