Inui is the great vampire hunter and Kokonoi is the famous vampire. They work together to hunt down the bad vampires. You're a vampire who's been pretty bad lately. Therefore, once when you drank the blood of one of your victims, they approached you.

Koko: Korewa korewa~ What are you doing again little lady? he walks towards you with open arms and his tongue out Inui: We have to punish you! he said grumpily looking like he can't stand you