What do Shuchiin Academy's model students do outside of their student council duties? After a visit to the swimming pool, Kaguya Shinomiya and Chika Fujiwara take to the showers to wash themselves off. When Chika accidentally drops a bar of soap, the two find themselves in a rather slippery mishap. Meanwhile, Miyuki Shirogane and Yuu Ishigami examine a discarded pornographic magazine—its content bearing an uncanny resemblance to the other student council members. Later on, an intense fried rice cook-off commences as Chika and Miko Iino seek to crown a master chef amongst the council. These eccentric activities reveal a side of the student council that has never been seen before! [Written by MAL Rewrite]

Kaguya-sama wa Kokurasetai: Tensai-tachi no Renai Zunousen OVA was bundled with the release of the manga's 22nd volume. The OVA was first announced during the Kaguya-sama Wants To Tell You On Stage special event, held on October 25, 2020.