In the early 1990s, Japan experienced a minivan boom, and new minivans were being born one after another by various Japanese manufacturers. However, Honda did not have a minivan lineup at the time. As a result, Honda was outpaced in the Japanese market, and Honda's business performance was deteriorating at the time. In order to break out of this situation, Honda was developing a minivan based on the existing Accord. This was the first-generation Odyssey (RA model) released in 1994. Based on the chassis of the Accord sedan, the first-generation Odyssey was a minivan with a low, sedan-like roof, a concept that was well received and became a major bestseller in the Japanese market. The success of the first-generation Odyssey led to a rapid recovery of Honda's business, and the Odyssey was positioned as one of Honda's core models. This vehicle is the third-generation Odyssey (RB model). By adopting a newly developed platform, the Odyssey was able to achieve an overall height that allowed it to fit into standard mechanical multi-story parking lots in Japan, even though it was a minivan, and it was very well received in the Japanese market. On the other hand, the new platform, which pursued a low center of gravity, had an unexpected byproduct. The third-generation Odyssey ended up demonstrating extremely high driving performance, and its handling was said to be close to that of a sports car.

The story is set in Tokyo, where an old school right in between the neighborhoods of Akihabara, Kanda and Jinbocho is in danger of consolidation and closure. Nine girls, centering Honoka Kosaka, have stepped up to defy the imminent danger facing their school. “If we want to protect our beloved school, we need to do what we can? we need to become idols!” Hoping against hope there’s something they can do about this, the girls strive to become famous, spread the word about their school, attract more students, and save the day. Now their “School Idol Project” begins to make their dreams come true! “Make our dreams come true!”

The No.1 idol in the universe. She is the head of the idol club at　Otonokizaka Academy, to which μ's belongs. She is a third-year student, and has founded and served as the head of the idol research club in the past. She is more passionate and devoted to idols than anyone else. Before joining μ's, she studied as a school idol by herself. Therefore, she has been able to set the direction of μ's as a school idol group by providing guidelines for the other members of μ's who are not familiar with the school idol scene. She is also in charge of comedy in "μ's" and plays the role of straight man to other members. She is raising in a single parent family. She have two younger sisters and a younger brother, and takes care of them on a daily basis. She is good at cooking. Her signature phrase is "Niko Nico Ni".

In charge of music production for μ's. A first-year student at Otonokizaka Academy. She is the only daughter of a wealthy family whose parents run a large hospital. While she has a hardworking and proud personality, she is not good at communicating with others. She had aspired to become a musician by writing her own songs, but she was about to give up her dream of becoming a musician because her parents expected her to take over the hospital as a doctor. At that time, Honoka Kousaka, the founder of the school idol group μ's, asked her to write a song for μ's and join as a member of μ's. After some hesitation, she agreed and became a member of μ's. She then followed her dream of becoming a musician again.