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Matahachi, Jin and Jambo are friends who will soon graduate from high school. They don't have much hope for their future, but just a vague wish for a change from their normal lives. They decide to take one last trip as high school students. ~~ Adapted from the novel "Poncho ni Yoake no Kaze Haramasete" by Hayami Kazumasa.

When Shiho Nishina got worried about her sex life with her husband, her husband proposed to her, "Why don't we go to a couple exchange party?" At first Shiho strongly turned down the idea, but eventually, she gave in because her husband was very persuasive. "We're just going to observe, okay?" Shiho said as she reluctantly agreed to it. Meanwhile, a former diplomat Mr. Kubozuka ran a couple exchange club, "Aquarium," with his wife in their house. At first, Shiho was being very cautious, but gradually, she got attracted to Mr. and Mrs. Kubozuka's charm and finally agreed to exchange couples with them. It seemed that their sex problem had disappeard and they had found happiness, but as it turned out, that was just the beginning of their nightmare...

'Riam' is extremely envious of her sister 'Ram' because she is beautiful, mannered and sweet. That's making Riam even more envious and pranking her sister. But everything changed because of the arrival of the thief has capture Ram and her mother. Riam and the 'Riam Sing' gang have to go on an adventure to help her family.