It just came to me in a flash of sakura-colored manga sparkles. If they ever did a live action version of
Skip Beat!,
Mikako Tabe would make a brilliant Kyoko.
Haruma Miura would be a good Sho - he can pull off that brash/dyed-hair punk boy look well (see:or rather, don't see the trite, so bad it's hilarious pure love sentimental teenweepie flick, Koizora. D fondly refers to it as emotional porn.)
Still deciding on who would make a good Ren and Kanae...
ETA: Saki Fukada for Kotonami Kanae