While the group from G Lunariam is undergoing special training, the inventor Lunar Bath XIII is enjoying his vacation. He calls Katsuma to join him for more fun, and when they are alone, Lunar Bath begins to serve him in a good mood. However, Katsuma is not just a passive participant! And finally, even Hekaterina reaches out to Katsuma!? The special training turns out to be of the lewd variety in a beautiful beach location with skimpy swimsuits and heavy heat, leading to intense sex scenes with deepthroat, paizuri, raw pounding, and creampie overload