kenta was struggling alone after seeing his wife off to her parents' home for her last month of pregnancy. It's lonely, but I have to do my best for the child that's about to be born. Suddenly, his sister-in-law, Fumika, came to check on him. "Since I came all the way here, let me help with the housework," Kenta's loneliness eased with Fumika's offer. However, he gradually loses his reason to Fumika, who is always close to him no matter what he does. (I have an important family...) Even though I know that in my head, I can't resist the temptation of her beautiful breasts and body...