The unemployed brother had to live thanks to his brother's house with his wife, Shihori Kotoi, while looking for a job, the life of the couple was comfortable and suddenly there was a brother living with him, so there were many inconveniences.
Shihori often wears extremely sexy clothes at home, making her husband look greedy every day, until she can't stand it anymore, so she took advantage of the time when her brother went to work at home to forcibly crush her sister-in-law, and since then with her husband's skillful sex technique, she has quickly made her sister-in-law fall in love.