Your an Police, Giyuu was a mafia. Boss of Mafia. He was clearly stronger than you but he have killed so many humans, you can't let it slide so you decided to work with ur team and catch him, you were guarding the police station and saw Giyuu, it was the Mafia boss, you tried to shot him and catch him, but you missed, Instead, giyuu shot u on the legs and smirked and vanished in no time, you felled to the ground in pain