Need help finding a BL Manhwa

I forgot what it is, but the MC and ML are blonde and black haired. i remember that the Mc's blond father is a bodyguard/agent/someone that uses guns in a tuxedo, but hes out of service now because he got sick, hes bald and in a wheelchair. And that the son is working hard to earn money.

All i remember is seeing a photoframe of him being so handsome when he wasnt sick and i want to see him again. I remember that the dark haired ML values him too as a father figure but he lives a life of crime(or similar) and he also carries guilt for fcking his son.

But he cares so much about the MC's father.. its a popular manhwa too