"You can't cum yet..." The man falls for the sweet temptation of his senior at his part-time job and decides to train to improve premature ejaculation! At a convenience store, a cafe, or an office!? The man who ejaculates prematurely after the senior's exquisite handjob, which varies in speed and speed, can't resist the senior's invitation to "Let's have sex..." and ends up doing it! The sight of the two of them craving each other at the end is a must-see!