I think this is the regular edition, and it will be released on June 24. I’ve read that many Korean fans are boycotting the OST albums (and personally, I’m not planning to buy this one either), but I’m posting the info here just in case someone is still interested. It IS a lot cheaper than the special edition.
This edition includes an additional CD of score instrumentals and a DVD with five music videos and a making-of edit of Suzy’s “Don’t Forget Me.”
However, it does NOT include the piano version of SeungGi’s The Last Words, or the music video of SeungGi’s song.
source: yesasia, gmarket