It was Yuji, a brother-in-law, who reached out to his wife, Sakura, and her daughter, Riina, who had lost their husband due to illness and were at a loss. After his older brother died, Yuji was asked to take care of them. Originally, Yuji, who was in love with Sakura, agreed and started living with three people. However, Yuji's attitude suddenly changed from the day he started living together, causing his hidden feelings and libido to run away. The two who have nowhere to go can't resist, and the days of Ryo ● are welcomed ...