Rentarou introduces Kishika to the rest of the harem, with Kishika baffled by her own willingness to date a boy with 16 other girlfriends. After some initial greetings, Iku challenges Kishika to a kendo match, and the latter proposes a match with everyone as a way to get broken into the group. Hahari adds on a penalty game for Kishika, where if she loses, the winner can give her any single order to her. All the girls are given paper balloons taped to their heads to serve as targets, and Rentarou serves as the referee.
The first girl to be eliminated is Iku, who is upset that the sword didn't hurt her. Hahari explains that they're using soft swords to prevent any injuries. Nano is the next girl to fall to Kishika's sword, and Kusuri follows in short order. Mei and Karane attempt to team up against Kishika, but she quickly deposes the two of them. Chiyo and Shizuka charge toward her, but she quickly realizes that Hakari is behind her on Yamame's shoulders. Failing to reach Kishika from where she's sitting, Hakari tries to bend forward, leading to the elimination of herself and Yamame, followed by Shizuka and Chiyo.
Naddy and Yaku have actually practiced kendo and manage to put up a much better fight against Kishika. Kurumi, Mimimi, Meme, and Momiji attempt to make use of this by ganging up on her together. Momiji gets Meme to disappear from under Kishika's sword, resulting in Mimimi's elimination, but within seconds, Kishika manages to dispatch all five girls ganging up on her.
With this, Mei declares Kishika the winner, and the other girls beckon her to claim a victory kiss with Rentarou. She approaches for a kiss with the boy, only for Hahari to burst her balloon. Hahari noticed Kishika's longing look when she was comforting Iku on the sidelines and had Mei dress up in a gyoji hat, counting on Kishika losing count of how many girls she defeated to trick her into thinking she won the match.
Hahari beckons Kishika onto her lap per the penalty game and proceeds to pamper her. Kishika starts melting, and the two are quickly surprised at their compatibility. The two enjoy the moment while the others watch on with bewilderment.
Tropes:
- Batman Gambit: Hahari noticed Kishika's longing look when she was comforting Iku on the sidelines and swiftly concocted a plot to trick Kishika into thinking she won the match before it actually ended. The plan required Kishika to not keep track of how many girls she defeated and for Mei to wear a gyoji hat to pretend to be a referee. Then, when she was distracted with kissing Rentarou, she snuck up behind her and burst her bubble.
- Breaking the Fourth Wall: Hahari mentions that the absurd number of people present may have made the audience forget that Kishika only defeated fifteen girls.
- Broken Pedestal: Downplayed. The end note mentions that while the girls are a bit disappointed that Kishika isn't as cool as they first thought, they're happy enough to accept her.
- Combat Pragmatist: Hahari snuck up on Kishika to pop her balloon while the latter was busy with kissing Rentarou.
- Curb Stomp Cushion: Yaku and Naddy have had plenty of kendo practice and manage to put up a much better fight against Kishika than the other girls.
- Didn't See That Coming: Kishika is surprised by Hahari offering to let her suck her breasts, and Hahari is surprised that Kishika was willing to take her up on it.
- Five-Second Foreshadowing: Near the end of the paper balloon sword fight, Mei declares Kishika the winner. But Rentarou was the referee for the match, and as Kishika attempts to kiss Rentarou, Hahari bursts her balloon.
- Product Placement: Kurumi mentions Toppo, a reverse Pocky made by Lotte.
- Shout-Out:
- Kusuri again tries the Oni Giri with kendo swords in an attempt to take out Kishika. Similar to Zoro's attempt against Mihawk, it fails, leading her to quote Goemon.
Kusuri: (defeated) Once again, an unworthy target defiles her blade, yep yep.- Naddy refers to herself and the remaining girlfriends as "the Hashira" of Rentarou's family.
