On our wedding anniversary, my wife visited a rural hot spring inn and was discovered by her former buddies from a sex club, leading to an unforgettable threesome all night… My wife, who had been patiently enduring, was completely depraved from beginning to end with her enormous penis. (Natsukawa Ayumi, SORA-505)

50 people have had experience with this product. Ayumi Natsukawa, a far cry from her promiscuous student days, is now a member of society, devoted to her boyfriend. During a trip to commemorate her first wedding anniversary, she encounters a college classmate in a local hot spring town. "I never want to see these guys again..." They are Ayumi's promiscuous companions. Ayumi vows she will never fall in love with them and possesses an unwavering will to never lose herself, but her old memories gradually resurface, and she begins to fall...