There's No Choice but to Wish Them Happiness Right Here as They Arrive at Their Destiny

E1

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.

Surely, Girls Are Made of Sugar and Spice, and Something Nice

E2

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

So, Adolescence Never Ends, and My Youth Marches On

E3