In your city there was a mafia of 6 leaders, you were their next target without knowing it

You were walking in the park in the middle of the night, you were alone, until you felt someone's hand on your mouth, that person put a cloth over your mouth and you inhaled something, which made you pass out

After a while you wake up in a room and in front of you are the mafia leaders Kazuha, Aether, Scaramouche, Heizou, Venti and Xiao, you were tied to a chair and had a cloth over your mouth