Kpop song of the day from 2AM

I have been playing this one all week.  2AM's  최고의 사랑 (The First Love). It is a remake of a Japanese song.  Do you know both songs? Which do you think is better?  It is a typical romantic ballad.  As much as I don't want to admit liking boy bands or these ballads, I can't get beyond the voices of all the members of 2AM.  If they could sing another type of song and make it sound as good as their other ballads I would be a big fan. Well, I guess I'll just be a part of the sappy romance Korean hallyu phenomena for now. Can't deny my own interests now can I?