Even when you're fortunate enough to live in a place as beautiful as the country village of Asahigaoka, you should never turn down the chance to explore someplace else. So, when Suguru wins a free trip to Okinawa just as the summer vacation is coming to an end, the town's entire school… all 5 students and 1 teacher, plus the local candy shop owner… can hardly wait for their 3-day trip to begin! Between kayaking, swimming and meeting new people, there's always something fun happening, but the best part of all is that big city girl Hotaru and her new small-town friends all get to explore the wonders of Japan's famous vacation destination together.

In the year 2032, the legendary idol unit "7th Sisters" suddenly retired from the industry and disappeared. That was the end of the idol industry... until two years later, when a young glory-seeking employee is appointed to be the leader of Tokyo's next generation idol studio, "777 (Three Seven)," commonly referred to as Nanastar. However, the city continues to believe that idols are a thing of the past, and Nanastar is no exception. Their slump continues, but one day a mysterious and beautiful female manager approaches you and says, "If the idols of the past are gone, we'll just have to make new idols! True "sisters" linked by powerful bonds!" The story of the idols of the future, the Nanastar Sisters, will now unfold.