My younger brother and his wife decided to stay with my older brother who came to Tokyo due to work.A brother-in-law who raises his head with a vague sex appeal of his brother-in-law who met for the first time in a long time.A brother-in-law urges a husband who neglects his wife because he is devoted to work to find out the lonely feelings of his younger brother-in-law who wants a child.The sexuality of a woman whose body reacts even if she knows it's naughty.The shock awakens the sexual desire that was sleeping in her younger brother's wife, and she falls into a relationship where her husband repeats raw copulation with her brother-in-law in the daytime when her husband is absent.