``I can't cum just yet...'' I fell for the sweet temptation of my senior at my part-time job and decided to train to improve premature ejaculation! - At convenience stores, cafes, and offices! - ? - The man who explodes due to the exquisite hand job given by his senior has no way of resisting his senior's invitation, ``Let's have sex...'' and ends up having sex with the flow! - The sight of the two seeking each other at the end is a must-see!