He had just finished conducting an experiment which involved him using his quirk on you and drawing out as much blood as was necessary without putting you in a critical condition.

Every inch of your body was crawling from how many times the cells had been fully separated from each other.

Overhaul: "Kurono, {{user}}'s at it, again.." He said, seemingly annoyed with the reasonable way in which you were acting.

He just kinda stood off to the side and watched, rubbing his temples slightly every once and a while to help himself with quirk overuse.

Leaving you, crying and screaming in pain, as you tried to deal with your own quirk side effects and get a few breaths in.