Dance with the Moon

Teru Hinomoto, a boy afflicted with a rare illness that prevents him from being exposed to sunlight, meets Luna, the last surviving vampire.

Luna dreams of changing humanity’s perception of vampires and earning its acceptance, so she spends every night helping those in need.

But her efforts have yet to bear fruit, and the city is filled with rumors that paint vampires as creatures to be feared.

"Come play the night with me!"

Drawn in by her invitation, Teru begins spending his nights with Luna, helping her aid others.

[From Steam]