My sister has been possessed by a succubus！！ My usually kind and quiet sister has become a completely different person! She's attacking me, targeting my dick! And to make matters worse, our parents will be away for the next three days！！ Even after I cum, she keeps demanding more sperm and assaulting me！！“I'm going to take all your sperm!” Come back to me, sister! Even as I think this, I keep getting fucked and feeling good… A story of three days where my body and mind were drained by my succubus sister.
