Cutting and kicking is the unique skill of Ji Ya, the heroine, and there are several scenes in which the hero is attracted. In most scenes, Kitano Kii didn't really hit Kento Hayashi, but because of the camera angle, the final duel scene had to be filmed. The director said that as long as it was gentle, but because of fatigue for days, neither of them could control their efforts and really fought. Kento Hayashi was kicked hard by Benay. Although he was brave, he didn't make it clear. In fact, it was very painful.

The stage of this film is Osaka, and the lines are all Osaka dialect. Kento Hayashi from Shiga Prefecture and Kitano Kii from Kanagawa Prefecture have received special dialect training.

Hu Li, the author of the novel, visited the film crew many times during the filming process.

Namioka Kazuki and Jun Toba used to box. In addition, Jin Mingmei, who won the world's lightest heavyweight gold belt of the International Women's Boxing Association on May 18, also made a guest appearance in the film.