The fourth generation of the Legacy Touring Wagon, Subaru's flagship model. Subaru focused its development efforts on improving collision safety in the fourth generation of the Legacy. Accordingly, the body design was redesigned, the body size was increased and the body rigidity was dramatically improved compared to the previous generation. While the body size was enlarged, the increased freedom of design and a fundamental review of the body structure resulted in a weight reduction compared to the previous Legacy. The fourth generation Legacy is characterised by its long model life. Previously, the Legacy had undergone model changes every four to five years, but because the fourth generation Legacy was so popular due to its high degree of perfection, it had the longest model cycle of any Legacy in history, at six years.

Otonokizaka Gakuin, a traditional school located between Akihabara, Kanda and Jimbocho, is on the verge of consolidation. Nine girls, led by second-year student Kosaka Honoka, rise up to meet the school's crisis. What we can do to protect our favourite school. ...... That is to become an idol! Become an idol to publicise the school to the world and increase enrolments! This is where the girls' 'story of making it happen together' School Idol Project began!

First-year student at Otonokizaka Academy. She is mild-mannered and kind, but is also reluctant to do anything. In order to fulfil her childhood wish to become an idol, she gathered up her courage and voluntarily joined the school idol group, μ's. She has more knowledge and passion for idols than anyone else, She collects and analyses information on school idols day and night. She also loves eating rice and is quite a glutton. She is a childhood friend of Hoshizora Rin, a member of μ's.