Thirty years back, a monumental “spatial quake” wreaked havoc on the Eurasian continent, claiming over 150 million lives through mysterious space vibrations of unknown origin. These quakes continue to occur, though less destructively, still impacting the world sporadically.
Shidou Itsuka, an ordinary high schooler, lives with his younger sister, Kotori. During a threatening spatial quake in Tengu City, Shidou rushes to ensure Kotori’s safety but finds himself caught in the quake’s disruption. At the center, he encounters a strange girl who turns out to be a “Spirit,” a supernatural being whose arrival causes the spatial quakes. Shortly after, Shidou is thrust into a conflict between the Spirit and the Anti-Spirit Team, a fierce group intent on eliminating Spirits.
Unexpectedly, Shidou’s own sister leads another group, “Ratatoskr,” which aims to save the Spirits. After the encounter, Kotori recruits Shidou and introduces him to an unconventional strategy to handle the Spirits’ threat—win their hearts. Charged with this unique mission, Shidou must now use his charm to approach Spirits and prevent further chaos.
[Adapted from MAL]