User blog comment:RyanTheScourgeOfTheStorm25/Quirk Ideas?/@comment-37102928-20181005045905

pretty similar to any pain nulllifying quirk,but

Quirk:Impervious

Allows the users body to convert any physical internal damage into endorphins that overwhem the affected area/area of impact during combat.Instead of pain,the user's brain interprets the sensation as relaxing and euphoric.However, the users quirk does not affect/repair the users sustained injuries(ie. cuts, bruises,broken bones,burns,etc).Thus,when the user is out of combat, the pain they would've endured during battle are all experienced at one single moment;Very excruciating pain depending on the injuries suffered.

Had this as a concept for a new student