[PPPE-040] Summoned succubus possesses his big-tits sister and it sparks a daily creampie sperm-extraction sex life – Karen Yuzuriha

The protagonist is a virgin incel who wants to get laid badly.

He goes on the internet and gathers some info on satanic rituals and manages to summon a succubus with such luck that his sister Karen opens the door at that moment. And Karen ends up possessed by a semen-demon spirit.

Karen is messed up forever. But he still coomed.