A perverted couple with a penchant for wife-swapping have implanted NTR fetishes into her! After lending her innocent and naive commoner wife to a wealthy couple, she falls into a quagmire of immoral pleasure. (Aozora Hikaru START-588)

Gardener Yuta and his wife Hikari receive an invitation to a "wife-swapping" arrangement from their wealthy employers. Yuta, who suffers from erectile dysfunction, experiences a sudden and intense erection upon witnessing his beloved wife being held in the arms of another man, lewdly indulging in lust. Awakened to an immoral pleasure, the two become mired in a quagmire of four-person sexual intercourse, a mixture of class disparity and shame.