Thirty years ago, a "spacequake" destroyed large parts of Eurasia and claimed 150 million lives. Today, these spacequakes are returning and it turns out that supernatural beauties - so-called "ghosts" - are their cause. To defeat the ghosts, there are only 2 options: To kill them or to... date them! Ordinary student Shido Itsuka, of all people, has the power to seal the spirits' powers with a kiss and thus save humanity from annihilation. But when the mysterious Mayuri appears, who is connected to all the spirits that have been sealed so far, the world faces an unprecedented danger. Can Shido also seal Mayuri's powers?