「手コキなら浮気にならないよ？」彼女の留守中に同棲部屋を乗っ取ったカノジョ志願ギャル・ひまりが、欲求不満のボクを狙い、3日間で20発の精子を容赦なく搾り取る濃厚寝取り手コキ！！オナホ・パンツ内・泡・授乳・足コキ・素股・事故中出しなど多様なS系焦らしプレイで、罪悪感と興奮の狭間で葛藤するも「浮気じゃないよ」と囁かれ抵抗虚しく射精を繰り返してしまう。ついに帰って来る彼女の眼の前での裏切り手コキ射精にボクは……！

"A handjob isn't cheating, right?" Himari, a gal who wants to be my girlfriend, takes over our shared apartment while my girlfriend is out and targets my sexual frustration, mercilessly squeezing out 20 loads of sperm in 3 days with an intense handjob session! With a variety of S&M teasing plays including masturbation with a sex toy, inside panties, bubbles, breastfeeding, footjob, bareback sex, and accidental cumming inside, I struggle between guilt and excitement, but her whispers of "It's not cheating" make my resistance futile as I keep ejaculating. Finally, I betray my girlfriend by ejaculating in front of her when she returns, and what will I do…?