I find it pretty good, it's a change from the rest of the action games on Nutaku since the combat takes place in real-time. It would be 200% better with PvP and ranking system like Harem Heroes
What do you guys mean by Battle Sprite? Are you talking about the 3D, or have I missed some h scenes?
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That will actually depend. Some girls apparently take a lot more crystals. I got the cannon catgirl and I'm pretty sure I've spent around 300 gems on her and she's still has a whole heart level to go.
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Starting to think leveling up healing skills was a mistake. Pretty much maxed it for my level since it's impossible to collect the coins required for next level, but it only heals a small fraction of my tank's hp.