Owen Kyokai has his comfortable rut all figured out: wake up, survive school, ignore existence, repeat. Perfect system, zero drama.
That is, until a white-haired girl shows up under a streetlamp claiming she needs to kill him to save her kingdom. Because apparently, that's totally normal. Owen's first instinct? File this under "definitely not his problem" and walk away.
But the universe has other plans. Strange lights appear in the sky, physics starts taking unexpected breaks, and his beautifully boring routine begins falling apart. Now Owen's stuck between two possibilities: either he's finally lost it, or this whole alternate-world business is legit.
Saving the world sounds like an awful lot of work—but hey, at least it's not boring anymore.