The 22nd volume of Kaguya-sama : Love is War manga will contain contents of the OVA episodes of the 3rd season of Kaguya-sama: Love is War anime. Shueisha announced the news in it’s ninth issue of the Young Jump magazine of this year. This issue came out on January 28, 2021. The OVA episodes will be available in DVD on May 19.

★今週の“かぐや様”！★

本日、YJ9号の発売日です！

石上のとんでもない出だしから
始まる話ですが、
事態は思わぬ方向へ！

※お陰様で度々全巻重版！
シリーズ累計1400万部突破！
最新21巻は2月19日(金)発売です！

そして、本日から22巻限定版の
予約も開始しました！ https://t.co/PiB8ZYuBB9 pic.twitter.com/JH698or0ai

— 漫画『かぐや様は告らせたい』公式@実写映画“ファイナル”8月20日(金)公開！ (@kaguya_comic) January 28, 2021

The Kaguya-sama: Love is War OVA episodes’ titles:

1. Kaguya-sama Darkness Volume 1 (swimsuit episode)
2. Kaguya-sama Darkness Volume 2 (episode about a certain book)
3. Kaguya-sama wa Tabesasetai (food battle episode)

Currently, Kaguya-Sama : Love is War manga has more than 14 million copies in circulation.

AnimeCorner describes the story as :

Known for being both brilliant and powerful, Miyuki Shirogane and Kaguya Shinomiya lead the illustrious Shuchiin Academy as near equals. And everyone thinks they’d make a great couple. Pride and arrogance are in ample supply, so the only logical move is to trick the other into instigating a date! Who will come out on top in this psychological war where the first move is the only one that matters?

Source : Kaguya-sama: Love is War Twitter account.