The Takasugi family, who was a poor single-mother family, gained a stable life by remarriage with their mother, Kyoko's elite office worker, Yoshio. At first, Yoshio looked like a good father, but one day he revealed his true nature and poisoned Mari. From the hardships of my mother and my feelings for my sick younger brother, the days of quietly enduring for the happiness of my family have begun ... Right next to my mother, near my younger brother, and while my boyfriend is coming, I endure the unwanted climax today ...