Help me!

Y'all does somebody know the name of that one MANWHA where the mc was a special agent Sargent or sum and he went to work under a mafia dude, who he fudged with and they fell in love but then when the ml realized he was working under him and fudging him just for a mission he got mad and told him to leave cus he won't do nothing to him cus he loves him. But then years later they meet again and I think MC is working as a normal police officer now and one of his coworkers is in love with him? I think ml had blonde hair while MC had brown hair