CAWD-601-UNCENSORED-LEAK Living Together, Stepbrother Loses Control Over Defenseless Sister Mai Arisu

After his mother remarries, the narrator suddenly lives with a stepfather and stepsister Mai, who is surprised to have a new brother but soon wears skimpy housecoats around the house. Her defenselessness gives him erections, and when he finds her napping with her butt exposed, he touches it and then has sex with her, despite her protests. His rationality disappears, and he cannot stop.