The first OVA titled Sore wa, ikinari otozureta=koi was released on March 29, 2019. The second OVA titled Tomodachi no Kyori was released on February 26, 2021. The third OVA titled Shain Ryokou to Negaigoto was released on October 14, 2021. Note: Unaired episodes bundled with the special edition of the 7th, 10th and 11th manga volumes.
Two OVA episodes featuring additional stories. Episode 0: Ritsu and Takano used to date back in high school, but broke up due to a misunderstanding. This is that story. Episode 12.5: Hatori and Chiaki go to visit the latter's family. It's really awkward in many, many ways.
Four unaired OVA episodes released on the DVD volumes. Note: Known as episodes 8, 11, 13 and 16 on the home release.
It is the start of Takatoshi Tsuda's second year as the put-upon vice president of the student council and his sister Kotomi is entering school as a first year. New friends and double entendres are made. (Source: Anime News Network)
OVA · 2021 · 1 episode7.5
OVA adapting both chapters of Kaguya-sama wa Kokurasetai Darkness and Chapter 96 of the main series.
OVAs of Seitokai Yakuindomo* which were either bundled with the limited editions of the manga volumes or as standalone OVAs.
They've already had their bodies swapped like musical chairs, had their ages changed at random and experienced their deepest desires taking control of them without warning, but if you thought Heartseed was finished with Taichi, Iori, Himeko, Yoshifumi and Yui, you've got another thing coming! Now there's a new affliction going around, and the name of this peculiar bug is emotion sickness. As in, suddenly your emotions jump out of your body and sick someone else! Needless to say, that's more than simply awkward if you've got a deep rooted phobia like a fear of men or repressed emotions that you've been trying to keep hidden, but in some situations it can literally be deadly! What is Heartseed up to this time, and why is he making our heroes involuntarily share their innermost dirty laundry?
Un-aired 11th episode of the TV series that's included in the Blu-ray. Recovery of an MMO Junkie / Moriko Logs In to Fruits de Mer: When Moriko's computer breaks down, she asks for help from a certain someone to buy a new one. Before even realizing it, she's agreed to have that person over to her place to build the PC itself! Who's coming over?! Will Moriko successfully clear the "Invite a Guest Over" quest?! (Source: Crunchyroll)
The OVA features six separate stories revolving around the cast, some of which border on the bizarre; one of which is an MMORPG environment being played by Konata, Kagami, Tsukasa, and Nanako Kuroi, and another in which Kagami has a "suggestive" dream about Konata.