All right... this thread is dead; understandable since Yumi's new and probably isn't gonna have any new single anytime soon..
Well I got tenshi no hane's help to translate the two songs from Haru Koi for us! It's in her LJ @ these links:
http://verduistering.livejournal.com/35101.html
thank u tenshi! btw Yumi wrote the lyrics to the songs herself, so that's pretty impressive!
and some pictures I found from her Engine Sentai Go-onger days in 2008:
she's so gorgeous when she's not in bikini posing as a gravure idol~