Short prologue OVA, bundled with manga volume vol.10. Elsie receives from Dokurou Skull, hell's branch chief of counter measures, the task to go on earth and capture evil spirits that have escaped from hell.

In a dark corner of the universe, intergalactic criminal Kain breaks out of prison and destroys the Galaxy Police Headquarters. Basking in the afterglow of the terror and destruction he has caused, Kain sets his sights toward a much bigger prize waiting on Earth. Meanwhile, Tenchi Masaki and his crew are watching some old home videos of his mother, Achika. As the film rolls, Achika slowly starts to vanish. While watching her fade away, Tenchi also begins to disappear. However, thanks to a device created by Washuu Hakubi, Tenchi is not gone for good. The gang soon learns about Kain and deduce that he must have done something to Achika, which has resulted in time being altered. To save himself and maintain the future, Tenchi travels with the girls back in time to protect his mother from her fate.

High schooler Tomari Hinowa is called to the principal's office one day to hear some shocking news: he's getting married! A mysterious fluffy creature called Kanenogi has chosen him as their wife, and despite Tomari's initial misgivings, he decides to accept. What follows are a series of delightful tales from this new couple's monstrous married life.

Young detective Sonia Summers has been transferred to the outskirts of the port city Libra after stirring up trouble with her superiors. Libra is separated into two sectors—the Upper, the center of wealth and politics, and the Outside. The Outside is home to crime, corruption, and curious incidents involving monstrosities or youkai. Each case that Sonia works on seems to implicate the involvement of these mysterious creatures. Sonia crosses paths with three peculiar humanoid youkai—Bem, Bela and Belo—who seek to protect humans and fight against the evil youkai that terrorize them. Living as Youkai-Ningen, they are excluded by other youkai for their human-like lifestyles, and rejected and hurt by humans when they reveal their true forms. Despite the hardships they face, these three Youkai-Ningen secretly live among humans, continuing to pursue their dreams of one day becoming human as well.