I found the full length version of the song Haruma sang for the movie Negative Happy Chainsaw Edge (2007). I downloaded it not knowing what to expect. Yeah, not the best singer in the world, but if you're a big fan of his I guess you could tolerate it...
It's called Konjou Nashi.
I downloaded it here http://www.aimini.net/view/?fid=9m1YonFLOgWIUSscXTvy
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Look Alike List
Everyday people I have seen that look like famous people in Asia
Tanaka Koki (KAT-TUN)
Oguri Shun [actor(Hana Kimi, Hana Yori Dango, Crows)]
Tamaki Hiroshi [actor/singer(Nodame Cantabile, Heavenly Forest)]
Ikuta Toma [actor(Hana Kimi, Honey and Clover)]
Yamamoto Yus