The adopted younger brother fell in love with his older brother, but the older brother later fell in love with a woman. The younger brother felt abandoned. After his elder brother died, his younger brother wallowed in the pain of the past.
Concept: A pseudo-orthopedic brother falls in love with a straight brother, but the brother gets married, has children, and eventually dies. The younger brother raised his elder brother's son and grew up. He could not get over the memories of his brother's death and loved his brother paranoidly.