What do you think of my comic story synopsis?

Sounds a bit like most romances, for instance School Rumble. Harima loves Tenma, Tenma loves Karasuma, and Karasuma loves curry(mmm, curry). I do like the magic idea, though. I think it's a good idea how it changes depending on your heart. I would give your characters more unique personalities instead of just strong, hyper, and laid back. Of course, the evil personality never gets old. Doing short stories sounds like a good idea. That way you can finish them instead of being stuck on a huge and elabroate plot line. I would give them actual weapons instead of just objects like a skateboard. Or maybe I just feel that way because you've given us this magical setting but then stuck in a normal, everyday object. Just keep working at it and you'll get it eventually. Good luck!