Divorced without a night out for many years, Saya is a frustrated divorced young wife who can't even make a sex friend and continues to comfort herself in broad daylight. When I am masturbating in broad daylight as usual, my ex-husband's older sister Reina comes to visit. "I'm really sorry. I'm a bad brother..." As if caring, he approaches Saya, who is no longer his relative, and awakens him to his own lesbian world.