Kohei decided to stay at his brother's house for a while while looking for a job. There is also Saya, his brother-in-law, who has been thinking about him for a long time. Kohei starts job hunting the next day, but it doesn't go well. Saya, who had been away from Kohei who couldn't stand the awkwardness and apologized, felt the pain of a woman and asked him unintentionally. Feeling love for Kohei who clings to him obsessively, Saya, who enjoys the pleasure himself, makes a promise with Kohei...