A husband's best friend secretly penetrates his wife while she thinks he can't see them at a blind spot. He doesn't want her to make any noise because if she does, they're both screwed! In this extreme situation where their lives are turned upside down by infidelity, they can't help but accept the unimaginable events and pleasure against their better judgment. It all starts when a newlywed couple faces their first crisis - being seduced by another man right under their noses in a darkened lighthouse room.

目の前の旦那の死角で、奥さんにこっそり挿入しちゃう男性エステティシャン。声を出したらヤバい！バレたら最悪状態！そんな極限状態だから、理性では拒絶したいのに、想像できない非日常の出来事と快感に、本能では受け入れてしまう奥さん。新婚ホヤホヤの夫婦が初めて直面した危機は、超至近距離で灯台下暗しな寝取られだった。