Spirits are otherworldly beings possessing immense power, able to trigger spatial quakes upon their arrival. One method of handling them involves using brute force to kill them... or causing them to fall in love and sealing their abilities. After sealing three Spirits, Shidou Itsuka continues his mission with Ratatoskr to find more spirits and date them, ensuring the world remains safe from further devastation. However, this time their troubles will not be confined to Spirits, as a more formidable threat appears to have taken notice of their actions.