Hai to yuki (ash and snow)

Twenty-one years ago the clocks stopped ticking and the calendars finished counting the days as an explosion, powerful enough to shake the whole world, changed everything.

Almost everyone perished, as they were already doomed from the start, except those stubborn enough to make it in a world of ash and snow.

The survivors were given supernatural habilities called "Bindings" as a mean to overcome their current situation. However, two of them will use them not to survive but to try and undo the damage and save everyone.

Prompt: Survivor Slaughter
Themes: Post-Apocalyptic
My themes: Shounen Fantasy Seinen