The life of the young couple was happy and happy, but suddenly one day Mizukawa's wife received a phone call from the hospital informing her that her husband had died in a traffic accident. Pained and sad because of this great loss, plus not knowing what the future would be like when she had to take care of herself alone, on the 49th day of her husband's death, a close friend of her husband came to visit and share with her what her best friend had told him before he died. Her husband had told him to help her take good care of her for the rest of her life at all costs, even though she knew this was not easy for her to accept. He only knew how to follow his friend's instructions, so when he finished lighting the incense, he immediately pressed her off and forced him to have sex with him because he knew that only by doing so could he fulfill what he had promised to his best friend who had died. After that time, he often visited his friend's wife more frequently, and every time he came, he did not forget to have intimate moments with her to make their relationship closer and more bonded. After many attempts, he finally achieved his goal; gradually, she developed feelings for him and began to forget her deceased husband to start a better new life.