Kono mama da to Otouto ga Techno Break de Shinjau kara Kozukuri!

After our parents' divorce, my three older sisters moved to America with our mom. Now, ten years later, they've suddenly come back! Worst of all, I'm under a 'masturbation ban' due to exams, and the day of its lifting just happens to be their return. My plans are ruined. But the shock of reuniting after a decade leaves me breathless—their bodies have developed so obscenely. Their carefree American lifestyle is too much for me. I try to relieve myself in secret, but they catch me. 'At this rate, you'll die from techno break. Why not let us help you instead♪' Thus begins a heart-pounding life of pleasure with my three sexy sisters. Adapted from the original work.