Ochi Mono RPG Seikishi Luvilias

Once there was a peaceful human world but a demon army create chaos to their land, Knight Luvilia battles the demon king Vois, but she was deveated and become a sex toy of Vois. Vois and his minion enjoys his victory by raping all the finest of women. When he's done though, she teleports away. In preparation for their next battle, Vois adds his little succubus who is also his younger sister, Ilis, and big-breast loli witch, Lufilia to his team.