How do I get the good ending?

[Warelieus]

Just got the ♥♥♥♥♥♥ one...

[Empyrrean]

You need to find a certain item. Explore the map more, dude. Remember that little windmill tower thing in Karst city that showed that box icon when you tried to use it (assuming you did, if you didn't then wtf r u doin)? That box is somewhere in the Royal Pinacotheca.

[hamachi]

First of of all, you need 2 items, Green Leaf and Sealed Wind. The Sealed Wind can be found at the Royal Pinacotheca, after getting that item, go back to karst city and find a small windmill. Use the sealed wind, turn into a cat, go in the small hole under the windmill. Inside there is a water that you can upgrade from maple Leaf to Green Leaf, after getting Green Leaf you can go to Karst Castle and defeat the Cursed Queen. If you done these, you get the good ending.