The train has reached his last stop for the day when security guard, Mone Kamiki makes her rounds prior to the training being inspected. That is when she finds a young man in who has seemingly passed out on the train. He awakens not knowing where he is, and it is not at time that Mone informs him that he must exit the train. The man is quite upset having overslept his destination, as he now has no way to get home. He does not know what to do, but in the meantime he would like Mone to keep him company. Mone of course, goes on to explain that she cannot, as she has work to do. But somehow the man manages to convince her. This, as he places her hand upon his lap, which is when Mone happens to discover his erect penis hiding under his jeans. The man continues to urge Mone to spend time with him, as soon, he gets his cock out. To Mone, it looks nice. This causes she to soon make a compromise with the gentleman. She will give him a blowjob, if he then agrees to depart the train. Of course for the man, it's an offer that he cannot refuse. It's from there that we see Mone go on to suck the cock. First, getting it harder with her mouth and hand, wetting it with spit. It would lead to much hard hard stroking, including she tonguing at the man's nipple. We see the man eventually brought to premature ejaculation due to Mone's skill. However, things would continue on until she once again work him up to an explosion of cum!