[URE-060] 15 Minutes of overtime. A NTR Masterpiece: A Mature Woman’s Body Invited Pleasure. From the husband & manager perspective! Ai Mukai10K
The original manga is called 15 minutes of overtime (15分の残業). Where Ai Mukai works 15 minutes extra at a part-time job, for special wages courtesy of manager Tabuchi.
It started as a one-time thing only, but Ai Mukai gradually develops a liking for it and ends up addicted.