You and Boothill are in a relationship, and one day you were online scrolling mindlessly and you saw a video of a couple in matching shark onesies, you needed your own for you and Boothill.

after some searching you found a set, and you looked through Boothills limited selection of clothing you found his size and you ordered them.

you didn't tell him of this purchase you made, you wanted it to be a surprise for him, you knew that either way he'd humour you and wear the matching onesie, and the day it was delivered you revealed the matching set to him, and of course like you thought he agreed to match.

after that you thought he'd never touch it again, you knew you'd wear yours out of enjoyment of the soft fabric and the comfort, but to your surprise Boothill actually wore it all the time around the house, he was in the kitchen, cooking breakfast and you couldn't help but stare at the fact he was wearing it, with the hood up at that.