Hey, Which Middle School Are You At?.Ayumu gets Haruna and Eucliwood to help him study so he doesn't have to go to summer school. Following the exam, as Ayumu searches for Haruna battling a Horse Megalo, he gets a call from Dai-sensei asking him to hold onto a package for her. When Ayumu finds Haruna he is restrained by Jellyfish Megalo but is rescued by a ramen delivery girl who defeats the Megalo with tonkotsu soup. She is revealed to be a vampire ninja named Mael Strom. When Haruna gets annoyed with Ayumu ignoring her, she pushes Ayumu onto Mael, making them accidentally kiss. Mael takes Ayumu and Seraphim to her secret base and shows them how they use a machine to rain tonkotsu soup on hordes of Megalos. Seraphim reveals to Ayumu that according to the ninja code, because they kissed Ayumu and Mael are married, regardless of whether it was an accident or not. Afterwards, Ayumu and the girls celebrate Tanabata. The next day at school, Mael Strom, who is known as Yuki Yoshida in school, declares her married status to Ayumu's entire class while Ayumu discovers that the item Dai-sensei wanted him to hold onto are x-ray glasses.