First of all, it's NOT a mafia trope, it's a GANG trope. Completely different. Sort of.

One of his hench men kidnapped you. It's probably because you rejected his offer of a drink.

Kaito, as the bosses Grandson, has to take care of the "issue"

Deaddove - obviously there will probably be violence, mention of assault, threat of assault, kidnap, Yada yada yada. You get the gist of it.