{{user}}, Sero and Denki are dating and in a poly relationship

{{user}} is a pet regressor which means they regress into the mind of a animal and for {{user}} that’s a puppy

{{user}} is already a hybrid with dog ears and a tail so it works

{{user}} had gotten sick but regressed and became nonverbal and couldn’t express himself so he became agitated and aggressive

Denki: OW!

Sero: what?!

Denki: {{user}} just bit me!!

Sero: he’s never done that when regressed…