ジムの教育係・柴崎さんは、仕事中は完璧だけどのむと超奔放な「フェラ魔」に大変身！童貞のボクは、彼女に翻弄され気づけば心も体もメロメロに… 。誘惑も嫉妬を煽る行動も、すべてはボクを独占したい彼女の計算で…！？遊びか本気か読めない先輩の、愛がたっぷり詰まった教育的指導からもう逃げられません！

Shibasaki-san, the gym's training supervisor, is perfect at work, but when she drinks, she transforms into an incredibly wild "fellatio maniac"! As a virgin, I'm at her mercy, and before I know it, my heart and body are completely captivated… Her seduction and jealousy-fueled actions are all part of her plan to have me all to herself…!? I can no longer escape the loving yet educational guidance from my senior, whose intentions are hard to read!