To LOVE-Ru Darkness OVA

OVAs included with volumes 15, 16 and 17 of the manga.

The dispassionate, transforming assassin Golden Darkness returns to peer deeper into the mysteries surrounding her new life, while a sinister Nemesis manipulates her younger sister Mea from the shadows. Along with their newly discovered mother, Tearju, this previously estranged family quickly becomes the center of everyone's attention. On the other hand, Princess Momo's Harem Plan stands on shaky ground amidst Rito's inability to confess to his longtime crush Haruna, who has grown feelings of her own. But things aren't as peaceful as they seem; an evil force looms amidst the innocuous commotion, threatening to eclipse the love, happiness, and friendship of Rito and his harem. Only the light of love can hope to banish the shadow. (Source: MAL Rewrite)

OVA adapting both chapters of Kaguya-sama wa Kokurasetai Darkness and Chapter 96 of the main series.

Two OVA episodes bundled with the 16th volume of the manga. One of the included episodes will be based on the story from the 15th volume, while the other will contain an all-new original story. (Source: Anime News Network)

Unaired episode 13 released with volume 7 of the Blu-ray and DVD.

Original anime DVD bundled with the 12th, 14th, and 17th volumes of the manga.

Four unaired OVA episodes released on the DVD volumes. Note: Known as episodes 8, 11, 13 and 16 on the home release.

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.