The regular edition is just the CD with all twenty four tracks.
The limited edition is the same for the CD but comes with a DVD with footage from the drama shooting that will probably focus on Fujigaya Taisuke and Kitayama Hiromitsu.
"Beginners! (TV Series)" Original Soundtrack [w/ DVD, Limited Edition / Jacket A] / TV Original Soundtrack
Both versions will be released on September 19th.
So for the hardcore Kis-My-Ft2 fans there is another release that you can sink your money into. Personally I will be happy with the single version and cannot wait to get it in about a week.