Ayumu gets Haruna and Eucliwood to help him study for an exam so he doesn't have to spend summer at school. Following the exam, as Ayumu searches for Haruna, who sensed a Horse Megalo during the exam, he gets a call from Dai-sensei asking him to hold onto a certain something. As Ayumu enters the battle, he is double-teamed by a group of Jellyfish Megalo but is rescued by a ramen delivery girl who manages to defeat the Megalo with her tonkotsu soup. She is revealed to be a vampire ninja named Maelstrom, though as Haruna gets annoyed with Ayumu ignoring her, she accidentally pushes Ayumu onto Maelstrom, making him kiss her. Maelstrom later takes Ayumu and Seraphim to her secret base and explains about how they use a machine to rain tonkotsu soup on hordes of Megalos. After they leave, Seraphim reveals that, because of the kiss ealier, Ayumu and Maelstrom are allegedly married. Afterward, Ayumu and the girls celebrate Tanabata. The next day at school, Maelstrom declares her married status to Ayumu's entire class while Ayumu learns the items Dai-sensei wants him to hold onto are x-ray glasses.
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