The official Twitter responsible for the anime Kaguya-sama: Love is War released a new promotional video dedicated to the OVA that the series will receive.
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💕最新PV公開💕
┗━━━━━━┛『告らせたい？
は＼アニメDVD同梱版第22巻／
✨2021年5月19日発売✨▶収録内容
『かぐや様ダークネスvolume1』
『かぐや様ダークネスvolume2』
『かぐや様は食べさせたい』#かぐや様— アニメ「かぐや様は告らせたい」公式 (@anime_kaguya) May 7, 2021
It is important to point out that the 22nd volume of the manga will include the OVA in DVD; this volume will be released on May 19th.
The OVA special will therefore have three episodes: “Kaguya-sama Darkness Volume 1”, “Kaguya-sama Darkness Volume 2”, and “Kaguya-sama wa Tabesasetai”. The third episode will be about a food fight.
The first season of the anime premiered in January 2019 and aired for a total of 12 episodes. A third season has already been confirmed, however, a release date has not yet been announced.
Source: ANN