After Nidhogg Estinien is afflicted with loss of control of his body and his mind slides back to a simpler mindset. Needing care and help, Aymeric and his partner Haurchefant take care of him while they go on a quest for a cure.

After a skiing accident leaves Corey unable to stop wetting himself, his Mum has no choice but to enrol him in a specialised potty training school to help him regain control. At almost every point on his journey through Millennium Academy Corey is resistant to accept help, making him find himself in wet pants very often.