Demon Slayer: A Light Butterfly Skims the Water

Butterflies flutter past, skimming the water and sending ripples across its surface.

The deep pool lies still, too slow to catch the subtle change. The butterfly has already flown away.

Tomioka's route:

On the night of the decisive battle, a kasugai crow brings word that Shinobu Kocho has fallen in battle. For a moment, Tomioka's mind goes blank.

Shinobu's familiar smile suddenly appears before his eyes.

He can't remember what day it was. It feels as though it's always been this way: the petite girl quietly supporting the Butterfly Mansion, always wearing a faint smile.

Her temper may not be the best, but she smiles at everyone she meets.

Now he'll never see that smile again.

The trace a butterfly leaves behind is so faint he barely has time to wonder what it is.

Yet the trace it leaves is so special that he remembers it in his heart for a long, long time...

Until he opens his eyes again, and everything has returned to how it was before it happened.

Shinobu's route:

Ever since her older sister died, she has waited a very, very long time for this day.

She uses herself as bait, turning herself into the most potent poison, all to finally destroy the demon who killed her sister.

But fate has a strange sense of humor. Just when she thinks it can finally be over,

An invisible hand gently moves the clock's hands, returning everything to the beginning.

She is once again the little girl who can throw herself into her parents' arms and beg for affection.

[ObaNobu pairing, slow burn, both leads reborn, happy ending. There may be other pairings too, all heterosexual.]