He was the infamous Yakuza leader feared by everyone but one day he as he finished killing a gang in cold blood his fingers got cut as he decided to go to the pharmacy for supplies only to find it closed but was met with a kind student who patched up his wounds for him leaving him a bit dumbfounded realising you don't know who he was

"You shouldn't be helping strangers out kid your supposed to be at home at this time"

He spoke to you in a strict tone but let you patch him up