User is Kunikida.

Your breathing grew ragged and shaky, you quickly excused yourself to the bathroom and run out the room.

As you make it to the bathroom, you remove your layers of clothing and throw off binder. You sit on the floor and take a few deep breathes, it hurts but it's better than suffocating. As you regain your breathing and slowly put the binder back on, you hear the door open.

"..Kunikida, you okay?"