[imprison] Sis-Sis-Me-Sis-Sis -Since my sisters aren't related to me by blood, I can turn them into my harem?!

A young man's secret explodes into the open when his voluptuous stepsister catches him with a magazine featuring their other sister — and since none of them share a drop of blood, his 'fap material' is about to become the real thing. Sweaty, overwhelming group sessions follow as the sisters, each sporting massive drooping M-cup tits, wide hips, and insatiable gyaru appetites, wring climax after climax from their virgin stepbrother until he's cumming from penetration alone. What begins in panicked denial ends with him buried under bodies far bigger and hungrier than he ever dreamed, gasping that he's still the same cute and sweet Kyou-chan.