Ayaka is in hospital and the news is not good: due to arteriosclerosis she will lose her legs. While she still can, she paces the leafy hospital surroundings in search of a suicide spot. She finds the perfect tree, one with a sturdy branch from which to hang herself. Just as she loops a noose around her neck, she is interrupted by a mysterious patient named Yoshino. This slightly macabre girl is also afflicted by a disease, but a fantastical one that will see her turn into a tree. Even though Ayaka is surrounded by death, disease, and defective bodies, Yoshino’s intervention leads her to cling on to life, no matter how absurd.

The first Himitsu no AiPri movie. The Ring Princess invites everyone to participate in a "Spring Float Race," but an incident occurs during the contest.