At the start of the weekend festivities, Kio hosts a "Watermelon Body Poppin' Battle" on the beach, where teams must crush watermelons using their bodies, specifically their thighs. Janu is pulled aside by Kio, who offers him a "bonus prize": access to a collection of booty photos taken during a slumber party, provided he plays a game of "Who’s Ass Is That?" based on the losing team's participants. Janu chooses to accept the game, though he expresses hesitation about the possibility of seeing his own nieces' photos.
The teams organize themselves, with the student group electing Dayai as their "fruit ninja" while the opposing team chooses Juna. The competition is intense, with both Juna and Dayai struggling to break the fruit. Ultimately, Dayai successfully crushes her watermelon by bouncing on it, securing the victory for her team. Following the game, if the player opted in, Janu receives a photo message from Kio as promised. The event concludes with Janu setting off toward the coastline to contemplate his feelings and the nature of his current relationships.