The parents of the kids at the preschool want to cancel the mud day that's planned for various reasons. Sota is against this and the only one who is with him is....Ayukawa. But after the parents role it out she goes with it. Sota is determined to change the parents' minds and asks her for help, but she declines and focuses on work. In the end, she helps get the rest of the signatures and they are able to have the day in the mud.