Hiratsuka-sensei asks the volunteer club to help her contribute to a local magazine themed around marriage. Since none of them, including Hiratsuka-sensei, knows anything about the subject, they ask someone who has experience "taking care of useless deadweight", namely Hatchiman's sister Komachi.

Iroha Isshiki takes Hachiman on a date to aid her in coming up with date ideas for her and Hayato.