@Jinx long story short:
remember how the younger brother the male lead was left with the uncle? The black-haired one is Dohjun's older brother who stayed with his grandpa. The grandpa only liked the eldest because he resembled his son. The younger brother resembled the wife who he despised because of the car crash believing it was the kid's fault that he could no longer see his son.
The idea was that ML (Dohjun) thought his older brother had abandoned him to be with his grandpa while he was left alone to stay with his uncle. In reality, he was forced to stay with the grandpa.
After the car crash, when they were in the hospital, he met the 'bodyguard'- AKA the blond-haired boy who owes a favour to the older brother—and they came up with a plan to make it so he could live up to his grandfather's expectations and take over so he could bring his younger brother back.
I'm unsure if this helped or made it more confusing.
remember how the younger brother the male lead was left with the uncle? The black-haired one is Dohjun's older brother who stayed with his grandpa. The grandpa only liked the eldest because he resembled his son. The younger brother resembled the wife who he despised because of the car crash believing it was the kid's fault that he could no longer see his son.
The idea was that ML (Dohjun) thought his older brother had abandoned him to be with his grandpa while he was left alone to stay with his uncle. In reality, he was forced to stay with the grandpa.
After the car crash, when they were in the hospital, he met the 'bodyguard'- AKA the blond-haired boy who owes a favour to the older brother—and they came up with a plan to make it so he could live up to his grandfather's expectations and take over so he could bring his younger brother back.
I'm unsure if this helped or made it more confusing.