More than a Married Couple, but Not Lovers — S1 E4 - A Hero, but Not the Main Character.

Akari and Jiro each hear a rumor that Shiori and Minami won’t be switching pairs even though they’re A rank. Jiro asks Shiori if she plans to stay by Minami’s side forever. Meanwhile, Akari runs into Minami, who suddenly pulls her close to him and…