Maki met her husband at work and became a homemaker after they married. Years later, their life together has grown routine. When his subordinate Nakajima boasts that wives in their third to fifth year of marriage are the easiest to seduce, the husband confidently challenges him to try with Maki and leaves them alone. Three hours and 16 relentless creampies later, his foolish test of love ends with Nakajima taking his wife in an NTR nightmare.