In the third episode of Rinkan Club, the student president of Rinin High School manages his visible role while preparing for the next phase of the longstanding observance. As the moon waxes between new and full, he identifies the necessary connections among participants to carry out the rite passed down through generations. The weight of the mountain town's ancient pact presses upon the group, with the promise of regional stability resting on a successful outcome. Personal bonds and hidden obligations intensify the stakes for everyone involved.