Your turn, again.
I hope it's not too obscure. ^_^
If it is too obscure, here's a hint: it's not a coincidence that it resembles Ragnarok Online.
Ok, since no one has made a guess so far, here are a couple of new screenshots and another hint: it was published in 2000 in korean, 2003 in japanese, and never in english.
I guess it took too long, so here's a giveaway: it was developed by Gravity and Sonnori, published by WizardSoft in Korea and Falcom in Japan.