help me find a manhwa

I'm searching for the name of a bl manhwa I read some time ago.
It was about an office worker and his superior. The mc was gay and somehow got involved with his superior. He fell in love with him but the ml didn't reciprocate his feelings. Then when he finally let go, the superior became obsessed with him like crazy.
After the mc quit, the ml made it impossible for him to get a job again, later making a deal with him to sleep together x times, before going their seperate ways.
The last thing I remember is the ml locked the mc inside his house not allowing him to leave, saying even he'd never sleep with again if that meant never meeting each other because of their deal.

The mc also had an older brother who seemed to be involved with some dangerous people. I think the opening scene of the first chapter was mc in some bar. That's all I remember:(( I'd like to read it again, if anyone knows the name please let me know<33