手コキ表現がピカイチのサークル「マンボー」とMOODYZが人気同人シリーズ『箱の中身当てゲーム』で実写コラボ！「正解すれば2万円」という甘い言葉に誘われたJ●やOL、修学旅行中の女の子、果てはとんでもないスケベ下着のお姉さんたちが、中身の隠された箱に恐る恐る手を伸ばしていく！箱の中で待ち構えているのは熱く勃起した「生チ○ポ」！何も知らない彼女たちは、正体不明の硬い棒を必死に握り、クンクン匂いを嗅ぎ、気づかぬうちに激しい手コキで精子をドピュッと搾り取ってしまう！箱の中に仕込まれたカメラが、至近距離でチンコをこねくり回す指先をバッチリ激写！目隠し状態での「手の中のヒミツ」が生み出す背徳感を見よ！

The circle "Manbo," renowned for its top-notch handjob depictions, and MOODYZ have teamed up for a live-action collaboration on the popular doujin series "Guess What's in the Box"! Enticed by the sweet promise of 20,000 yen for a correct answer, high school girls, office ladies, girls on a school trip, and even women in incredibly sexy lingerie cautiously reach into a box hiding its contents! Waiting for them inside is a hot, erect "real cock"! Unaware of what awaits them, these girls desperately grasp the unknown hard rod, sniff it, and before they know it, they're furiously hand-jobming it, squeezing out every last drop of semen! A camera hidden inside the box captures the fingertips kneading the cock at close range! Witness the sense of transgression created by the "secret in their hands" while blindfolded!