In the land of Selenus, a great war has raged for hundreds of years between the allies and the demon army. Now, at last, victory for the allies is within sight. The allies commission Valdo and his mercenary troops as the vanguard of the final assault.
The attack succeeds, but, Valdo and his people have plans of their own…
Based on Kuroinu ~Kedakaki Seijo wa Hakudaku ni Somaru~ hentai game.