On her first day at the love hotel, Kubo is a very innocent girl who doesn't even know how to use a vibrator. Her senior, Komaba, is aroused by her and, under the pretext of giving her a lecture, presses a vibrator against her...! She is attacked without knowing why, and climaxes many times from the stimulation she has never experienced before, but she is actually a virgin. Komaba becomes even more excited and gives her a lecture on what to do next, thrusting his cock into her unexplored pussy...!