After getting flustered by Kenji's demands to hide his bag from Shio and Ataru, Funabori ends up preempting the boys by sticking her own head in the bag. Kenji's little sister comes to visit her brother's club room, but ends up getting increasingly scared by the girls inside, then flees after Takao accidentally smacks her against a bookshelf. Takao tries to make nice with her to get closer to Kenji, but her attempts backfire.

Takao comes up with a contest called "Cell Thievery" where each team tries to snatch an opposing player's cell phone and correctly answer a question about that person written on the phone. Roka demands that Kenji "princess carry" her after Tama's hug from earlier drained most of her strength, and the two of them run away with Sakura, but two of Tama's team are in hot pursuit. Eventually, Roka regains her strength and distracts Naganuma long enough for Kenji to knock him out of the game. Chitose finds herself losing against Tama's strength and needs help. Roka tells Kenji he has a secret move: the "Vertical Jump." Kenji literally jumps up to the second floor and is immediately surrounded by the Basketball Club.

Some of the teachers decide to bet over whether the Game Creation Club or the former student council will win their battle. Chitose has a flashback to when she was a kindergartner playing in a sandbox. Every time she tried to build a sandcastle, Tama would come over and smash it, until Roka appeared and helped Chitose bury Tama in sand. Since that day, Chitose swore to one day build a legendary sand castle, and Tama swore to break everything that Chitose loved for her humiliation. In the present, Tama's sumo slap attacks and "double kabuki" technique are keeping both Kenji and Chitose from getting to her cell phone. However, Kenji comes up with a plan that lets him slip past her guard and pull off Tama's hair ribbons, letting Roka subsequently place a bag over her head. The Game Creation Club is declared the winner. Later, Tama plays a round of "Quest for Porn Mags in Space" to get closer to Kenji, while swearing to his club members that her original goals haven't changed.