When fellow “monster” Hikawa threatens Clair, Shuuichi freezes up, and Claire hits Hikawa’s eyes with pepper spray. Rather than fight, Shuuichi gathers Claire up and escapes out the window. We learn that Hikawa was her school’s ace runner, and became a “monster” by depositing the star coin in the vending machine and wishing to run faster.
Hikawa wasn’t prepared for the monkey’s paw-like downside of her wish, but now she seems accustomed enough to it that killing Shuuichi and Claire is no big deal. Did gaining monstrous physical traits make her into a monster, or was she one before those traits manifested?
Whatever the case, Shuuihi absolutely sucks at fighting, so when Claire finds a zipper on his back, she unzips him and finds nothing but a fleshy pocket inside. And while Shuuichi stopped himself from going to far with Claire after rescuing her from the fire, Claire dives right into that pocket and finds that it fits as snugly and comfortably as a glove.
As a result of “becoming one” with Shuuichi, Claire can now control his body, and her moves are a lot sharper than his was. Shuuichi finds he has no control over his body, but his thoughts and sensations are merged with Claire’s, forming a symbiotic pilot-vehicle pair. While this isn’t conventional sex, it’s definitely a weird supernatural analog.
A brutal fight with the berserk Hikawa ensues, and Claire gets better and better at controlling Shuuichi’s mascot body. Before long, Hikawa takes a couple of hard licks and wears down. Claire puts her leg in a hold and threatens to snap it if Hikawa doesn’t tell her everything she knows about the star coins.
Hikawa ain’t talking, so the leg goes snap, and then Claire draws the mascot’s gun—which is real, it turns out—and blows Hikawa away. Shuuichi’s desperate pleas for her to stop go ignored, and when the threat has passed, Claire emerges from the mascot’s interior a sticky but satisfied mess.
A week passes, and both Claire and Shuuichi go back to their ordinary lives without any developments. Whatever went down, it seems they weren’t seen and aren’t suspected by anyone. The two meet in private, and Claire tells him other “monsters” are out there and both of them individual lack the strength to fight them; they have to act as one.
Claire also has a personal interest in this whole mascot monster business—her sister Elena is one, and she’s eager to find her. She also promises Shuuichi that whatever happens, she’ll die with him so he won’t be alone. When he asks what she’d do if he wanted to die now? She leaps off a warehouse balcony, hoping to “see him soon”. Shuuichi is able to catch her, but if he hadn’t, she’d have died right there.
Half a year ago, Elena visited the vending machine, but asked the boy inside to give her wish to someone else…someone she “wants to be with.” The strap on her bag is a tiny version of Shuuichi’s mascot form. What’s the connection? Why him? And will Claire gradually wear down his basic decency and make him a monster, or will he continue to let himself be her puppet?