The premise is so grotesque it circles back to funny: your cousin is pregnant, a magical world needs you to impregnate twelve shrine maidens to save it, and everyone acts like this is normal. The show commits to the bit hard enough that it stops being offensive and starts being absurdist camp. By episode six, you're not watching a harem anime, you're watching a show aware it's ridiculous, leaning in, and somehow landing jokes about the sheer audacity of what it's asking its protagonist to do.

Itsuki's graduation day takes a surreal turn when he learns that Mahiru, his cousin and childhood friend, is pregnant. Moments later, a gate of light pulls them both into Granvania, a magical world overrun by monsters called Impurities. Only the star children can fight them off, and those children can only be born to the twelve constellation maidens. Seen as the land's last hope, Itsuki must father star children with each maiden to drive back the Impurities, and until he finishes that task he may never find his way home. Based on a Spike Chunsoft role-playing game, the series mixes action and adventure with fantasy and romance.