mafia boss x office worker

Hi! I'm looking for the title of this korean bl. The MC is an office worker whose parents favor his sibling more than him. He strives to be perfect; a model employee who flatters his boss, a filial son and all that. He's also closeted. One day he met the ML by chance and they had a one night stand. The ML wanted to keep the relationship going, but the way he said it made the MC think he was being threatened. Since then the ML would have the MC escorted by his subordinate, who refers the MC as the boss's mistress. I think the ML was being sincere but had the choice of words of a schoolboy bullying his crush. (〜￣△￣)〜