Alright, I managed to try it out up to the forest maze, because I hate forest mazes, and here's what I think so far. I don't usually play RPGs, so take what I say with a grain of salt.
First, the boss sprites. They're quite disruptive after the very detailed enemy sprites the player sees. You really, really should change them. If you'd like, I can put together the pictures for you. A quick Danbooru search for Kana already turned up a perfect image to use.
Second, while most of the songs are very fitting, one particular normal battle song just sounds way too epic for a normal fight. It's the one that starts out slow, going "da nanana na naaaaaaaa, da nanana na naaaaaaaa". I can't remember the name of the original, since the tune seems very familiar, but I hope you know which one I mean. On another point, I'm very grateful that you randomized the combat themes. That's one thing LoT was lacking.
Finally, I'm sorry to say, but Akyu's portrait does not look right. Especially when next to Daiyousei or Kana, she looks ridiculously short. I'd suggest either finding a new picture or increasing the size of that one.
Otherwise, it looks good so far. The battle system seems more like a traditional RPG than LoT (attack function is actually useful, HP doesn't regain after fights, random battles really are random, etc.), which is going to take me some time to get used to.
I'll see if I can play some more later. Keep it up, I'm looking forward to this.
(Oh, one last thing. How hard would it be to add a custom portraits system like LoT does? Just a passing question.)
