The series follows Souta, a young man completely infatuated with his beautiful classmate, Airi. Lured back to her home under a clever pretense, he quickly discovers he's walked into a sexual trap laid by Airi and her two equally seductive sisters, Kairi and Mairi. What begins as a supposed study session rapidly devolves into a relentless campaign of sexual domination. The sisters take turns overwhelming Souta, using their bodies to break his will and turn him into their personal plaything. He's subjected to intense, back-to-back encounters, from deep-throating blowjobs that leave him gasping, to being used in steamy threesomes where every one of his holes is explored and filled. The narrative arc traces his journey from a shy admirer to a completely submissive sex slave, culminating in him being 'captured' and fully accepting his fate as the sisters' shared toy, endlessly providing them with his seed in a series of raw, creampie-filled orgies.