Since he was a child, Yuto has been compared to his capable older brother in every way. This is the main reason why he has lived his life tormented by feelings of inferiority and inadequacy. Keigo treats Yuto like an incompetent servant. Soon, the hatred Yuuto felt towards his brother's wife 'Aimi' turned into desire and became a reality. He impregnated his seemingly perfect sister-in-law and indulged in pleasure after inseminating her. Such a brother was accepted, the brother excited by NTR, the wife who loves her brother, accepts everything from the brothers, and becomes a new family...
