Whumper inadvertently damaged Whumpee’s lungs with a experiment /torture session/ game gone too far. They’ve always wanted total control of Whumpee, it never occurred to them that they could have it through this happy accident.
Because now, even after Whumpee is saved, their lungs are scared and the damage is done. What exactly is the damage? Partially collapsed lungs, partial atelectasis to be specific, where certain areas do not inflate anymore and thus Whumpee will never have a full breath.
Their breathing is forever short, controlled and with a little stab in their chest, never able to fully breathe in and out in large breathes at their leisure. And Whumpee knows that the thought of this delights Whumper, as if they still had their hand around their neck controlling each breath of air they took.







