MEYD-821 My brother's wife is really promiscuous.

Rin lost her husband in a car accident. One day, while Rin was mourning after giving up the sake that he drank daily due to the sudden news of his death, his father-in-law Yoji came to visit Rin. Yoji, who was very close to Rin since her husband was alive, expressed all his resentment for losing his beloved son. Rin was forced by Yoji to drink. Yoji knew that when Rin drank, he would turn into a woman with horns. A few minutes later, Rin, who was drunk, was with his father-in-law, whom he hated fiercely.