Adult PC Game: Crimson Keep Ch. 7 v 1.6 by Introspurt Archive

You control a half-human, half-incubus named Soriel, who is the son of Nen. While he would like to just wreak havoc with magic and slay any enemy that crosses his path, his Mother has other plans for him.
A story told in RPG format with lots of cute girls getting fucked and filled with cum.