Karin received a supernatural power called "Apotheosis" from a ring that was a memento of her parents. The ring led Karin to meet Kazune and his friends, and her destiny changed drastically. In the battle over the ring, Karin and Kazune's hidden secret is also revealed?! One day, a little boy appears in front of Karin. That boy seems to be the child of Karin and Kazune, who came from the future... wait, what?!