Arcus Plume - Succubus Research Diary v1.5.1 - Adult Sex Game

Overview:
The daring explorer Serena and the kindhearted succubus Nerisha meet by chance in the depths of the Underground, as Serena accidentally stumbles upon Nerisha's doorstep. After learning of each other's circumstances, they strike an unusual deal. A deal that involves the two of them having lots of sex...