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Inviting an amateur couple on the street to visit an AV shooting site, and if the boyfriend does not get an erection after observing an erotic shooting at an AV site that can not be seen usually, there is a prize money. However, if you have an erection even though you have a girlfriend you love, a punishment game is waiting for you, a confident boyfriend but a man! The spectacle that unfolds in front of her makes her lower body grow bigger and bigger, and what will happen to her...?