The sudden appearance of my stepsister, who is completely unapproachable and a total shut-in! Naturally, her friends are all otaku shut-ins too! What's going on in the head of such a stepsister... Is it on the verge of exploding with perverted delusions? She saw my erection by chance and lost control, coming to seek my dick! And when this fact reached her otaku friends, the perverse knowledge they cultivated from erotic manga erupted, leading to an unexpected orgy & high-tension continuous in-shoot climax! They made overly dramatic reactions like those in erotic manga, such as ecstatic faces and V-signs, becoming total perverts! I was completely played around by these stepsisters!
