The second generation of the Passo, which was jointly developed by Toyota and Daihatsu. It is supplied by Daihatsu on an OEM basis. Its sibling sold by Daihatsu is the "Boon". The planning and marketing is led by Toyota, while the design, development and production are led by Daihatsu. The design, development, and production were led by Daihatsu.

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!”

In charge of making costumes for μ's. She is a second-year student at Otonokizaka Academy. She has known Honoka and Umi since childhood. She was invited by Honoka to become a member of the school idol group "μ's" in order to save Otonokizaka Academy. Incidentally, she once worked part-time as a maid in Akihabara and was called "Minarinski", the legendary maid. She is very dexterous with her hands, and the costumes of μ's were handmade by Kotori. Her dream is to become a clothing designer.