I Never Back Down from a Wave Fight

is the twenty-first episode of the first season of the Fruits Basket 2019 Anime.

Summary
Members of the Prince Yuki Fan Club do some scheming and visit Saki Hanajima's house.

Plot
Members of Yuki's fan club, as well as Motoko Minagawa, are plotting to separate Tohru from Yuki. Saki is also involved and after school at her house they attempt to discover any weaknesses.

They decide to look for clues in Saki's room before coming across her younger brother, Megumi Hanajima. Saki helps alleviate the tension having figured out the trio's true motives.

To assist them in leaving, Megumi mentions their names which causes them to run since Saki announced this was a way to curse them. After, Saki does feel jealous since Tohru is spending more time with members of the Sohma family. Arisa and Tohru herself help restore her happiness.

By morning, Motoko has had a nightmare involving Saki and Megumi. The curse also takes three days to take effect.

Trivia

 * The episode title is taken from one of Saki Hanajima's lines.
 * This episode marks Megumi Hanajima's and Mio Yamagishi's first appearance in the anime.

Anime and Manga Differences

 * Motoko’s nightmare scene with Saki was added for the anime.
 * When Tohru stated she couldn’t visit Saki originally in the manga, she mentioned only Kisa was visiting her since Hiro had yet to be introduced at that point in the manga.
 * The line of schoolgirls saluting before Yuki appeared in prince attire just as info on the Yuki Fan Club was about to be narrated got added for the anime. In said same scene, the rules for the Yuki Fan Club were more longer in the manga that include not stealing Yuki’s belongings, not going to his house, and how to address him depending on school seniority.
 * Parts of Motoko and the Yuki Fan Club’s conversation about Tohru’s closeness to Yuki had some differences between the anime and manga.
 * The anime included Motoko imagining Tohru with an evil face in believing she’s a witch.
 * Minami had a more angry facial expression in the manga.
 * The anime added Minami describing herself being affected by Saki’s denpa waves and being bedridden for a week because of them.
 * The declaration by the Yuki Fan Club was extended a bit for the anime.
 * Megumi’s face peering out a window to observe Saki and the Yuki Fan Club was added for the anime.
 * The Yuki Fan Club arriving in and scouring through Saki’s room was expanded a bit for the anime. This included the girls fearing tasting Saki’s tea, seeing all her informal attire and makeup accessories being black, and that she is an avid collector of shoujo manga.
 * The table that Saki, Megumi, and the Yuki Fan Club eat on is rectangular in the manga, instead of being circular.
 * The scene showing Motoko observing Tohru leaving school with Yuki and Kyo as she vents to Saki was added for the anime.
 * Motoko’s second nightmare with Saki and Megumi was added for the anime.
 * The Yuki Fan Club’s encounter with Saki and Tohru the following day at school was extended a bit for the anime to include the three girls feeling exhausted from lack of sleep.

Episodio 21 (2019) Je dois répondre aux provocations des ondes エピソード21（2019）