本番禁止の健全メンエス。だからこそ超美人エステティシャンが在籍しレベルの高い施術が約束されている。当然男性客の勃起など日常茶飯事で慣れっこ。見るだけで欲情するなんてことはない。しかしそれがデカチンで、施術中にうっかり事故ナマ挿入しちゃったら？？想定外の事故ナマ挿入の連続でエステティシャンも思わず突発的な発情状態に！そして普段なら絶対にしない本番を解禁…。そうこれはあくまで事故…。様々な偶然が重なった結果、超美人エステティシャンの理性が狂ってしまっただけ。だからこそ本能全開のセックスに興じることができる。

A legitimate men’s spa where actual sex is strictly prohibited. That’s precisely why they employ stunningly beautiful estheticians and guarantee top-notch treatments. Naturally, male customers getting erections is a daily occurrence, so they’re used to it. Just looking at them doesn’t arouse them. But what if it’s a huge cock, and an accidental, unprotected penetration happens during the treatment?? A series of unexpected, unprotected penetrations sends the esthetician into a sudden state of arousal! And she ends up allowing the very thing she would normally never do… actual sex. Yes, this is strictly an accident… It’s simply the result of a series of coincidences that caused the stunningly beautiful esthetician to lose her rationality. That’s exactly why they can indulge in sex with their instincts running wild.