Dagger: Senka no Kizuna

Humans, demons and spirits.
These three species descended into a great war
that has carried on through the ages.

A survivor of that war, Tisto Rayer, possessed
extraordinary powers, now living in quiet solitude.

Each month, he traveled to the nearby town to purchase supplies.

On his way home he came upon a young girl.
Unable to turn his back on such a wretched thing he
extended his hand. And the story begins.

A first-person tale of a young man and the
bonds he creates with girls in a war-ravaged fantasy world.

[From DLsite English]