Re-invent? I disagree. She has a unique sound that works perfectly for her, and I think she can still make amazing songs based on that. I'm open to her experimenting with new things (which is what she has been doing for a good while: the disco-banger Saturday night, funky INdependeNt GiRL?, and acoustic ballads motto. and Nearly Maybe... clearly stand out in her discography, especially compared to her more electronic-influenced early works), but I don't want her to throw away what works.
EDIT: Damn, couldn't catch a stream because of traveling. :< I hope the song will pop up soon.
Sony uploaded a little blurb about the song, describing it as a number with a "UK rock taste" from MiChi's roots. Apparently the song is composed by Yoichiro Nomura, the guitarist of MiChi's live crew, and the lyrics are done by MiChi and (not sure if I'm reading this right) Ishiwatari Junji.