This is a story of magical girls.

Once upon a time,
a handful of magical girls are said to have saved the world.

In a tale that's all too common, war was waged.
Blood and tears were shed,
and all prayed for salvation.

And yet, when all was said and done—
when blood and tears were wrung dry,
and all prayers gone—
not a soul offered them any thanks.
None even knew it had happened at all.

Nonetheless, the war was won.

These girls made their tale's end a happy one.

Ten years later. Present day...

Spring.

A season of meetings and partings, awash with blossom's vows.

The girls who once saved the world now lead peaceful lives,
having forgotten how to use magic entirely.

One day,
beneath the petals scattering in the sky.

"Please..."

A boy named Taiga finds himself reunited with a girl,
and face to face with spring once more.

"Turn me back into a magical girl."

This is a story of magical girls.

Nay, it is a tale of seeking happiness; of prayer.

A story of something to live for.

A story of a trigger pulled,
so that you never need feel sorrow again,
on the night the blossoms bloom.

If it's to save you and you alone...

I'll scatter and fall as many times as it takes...

[From official english website]