Looking for this bl

I remember reading this bl not too long ago and im not sure if I saved but.. I cant remember much but I do remember the mc never graduated highschool cause of his father (?) And is like 20 or sum and was basically forced to go to the cou try side with his grandma then he meets this gangster and pretends to be a minor but then accidentally gets intimate with him so now the gangster thinks he caught a case and it was funny does anyone have the link?