Ugh.

The hero: I didn't really like him. He is presented as this perfect being, but he's so arrogant and close-minded, and he certainly does not display a 400 year-old's maturity either. Mostly, there are so many things he handles SO. STUPIDLY! And he's horribly careless with the heroine's feelings, how many times does he break her heart?! "Selfish" indeed.

The heroine: very endearing, the best part of the drama for me. Except she gets along with pretty much no one in her life, so other than her cute scenes with the hero, we're treated to fight scene after fight scene, which isn't pleasant to watch at all IMO. And for the whole latter portion of the drama, even her scenes with the hero aren't enjoyable anymore, since she's so upset and spends so much time crying.

Also bad: the second lead's creepy obsession with the heroine, the frenemy's repetitive crap, the childhood friend whose scenes are even more tacked on than usual.

Lastly: don't think too much about the whole 13/15 year-old thing. Yuck.