No, it doesn't. This series starts with a bang as the setting, the situation, and the characters are somewhat unique. It is predictable though as the moment he says "don't fall in love with me", most of us must have known that they are going to be in love anyway. Still, the fun of reading is to find out how we are going to reach that ending, so it is okay.
I think the mangaka handles the plot well until Yoh x Haruna and Yoh'sis x Fumi pairings first get together. Yeah, the cliche is there, but the dramatic factor keeps the story somewhat captivating. Then it just goes down hill from there. I noticed the remarkable length of this manga before starting it so eventhough I thought the mangaka should have ended it after vol 3., I kept on reading and hoped to be pleasantly surprised. However, I started skimming after volume 4, and gave up soon after. Sigh.
The whole shenanigan with Yoh's sister toward the end was ridiculous, and it seems as if the mangaka was desperate to come up with some arcs to squeeze all the juice out of the manga (not that it wasn't really dried already). It takes only a few volumes for the main couple to get together; the rest (majority of the manga) is about their dating life, which, unfortunately, was portrayed really dull and shallow.
It is quite hard to keep a long shoujo series interesting. Parfait Tic does a better job than this manga in keeping the drama going on. But that doesn't make the reading any less frustrating. So, sometimes, less is definitely more