His wife Miu, whose married life is not very exciting, started working part-time at a convenience store and was having fun being taught the job by a younger male student. However, the man who was excited by Miu's unconscious buttocks as she worked reached his limit and suddenly started groping her buttocks and cumming inside her from behind! Confused but also frustrated, Miu has an affair with him during her shift, cumming inside her from behind and inside the store! Her big buttocks tremble as she is fucked by the young man's devilish pistoning! His insatiable cock gets hard over and over again on the married woman's sexy buttocks! He gets unfaithful at the best place where he can get fucked while still getting paid by the hour...