Nobody talks about this one. Touka and Momoka's pull toward each other isn't romance, it's reincarnation dragging them both backward into a cycle neither of them chose, and every answer about why they're connected destroys something they believed about themselves. The show builds its mythology backward, piece by piece, until you realize the tragedy isn't what's coming. It already happened, centuries ago, and they're just now living through its echo.

Touka Kamiazuma carries his clan's old duty of guarding Kamitsumihara, a place where magic and myth still quietly linger. The sign of his calling is Sekiken, a legendary stone sword held within his own body. His bond with the land grows deeper when Momoka Kawakabe, a young girl, comes to stay with the Kamiazuma family. The two feel drawn to each other without knowing why, and fate soon pulls them into a tangle of dark secrets and long-past tragedies. Their meeting sets events in motion that will awaken an ancient legend and alter Kamitsumihara for good. The result is a supernatural romance and drama about a promise left unfulfilled and a land haunted by its past.