The title is "Same Nagara Miru Yume" and it's Yoshikuni Douchin's Theatrical Stage! He's going to be the 1st lead actor. The female lead is Eri Murakawa from AMUSE agency. Unclear about the synopsis though because I'm not really good with kanji. :(
Here's the link : http://www.ntv.co.jp/sameyume/
If I'm not wrong, the musical stage is going to be held after CHEMISTRY's newest single. Wow, both of them are getting busy!!