This year's 47th issue of Akita Shoten's Weekly Shonen Champion magazine announced on Thursday that Nikki Asada ( Sound! Euphonium original character design) will publish a one-shot manga titled "Girl Versus Girl" in the magazine's 50th issue, which Akita Shoten will publish on November 12. The magazine notes that this will be the first manga that Nikki Asada will publish in Weekly Shonen Champion .

The magazine teases the one-shot manga:

An all-girls school infiltration love comedy. Yōta took the place of his sister and dressed as a girl to enter an all-girls high school. What will happen to him?