Also, there were some game systems that I totally overlooked and only discovered how they work by the end of the game.
I don't remember seeing anywhere that you could call the heroine between 17~18pm to allow her to hunt with you to unlock more population. I've tried to call her a few times after getting off the dungeon and always got the "maybe in the bath" message and just assumed that she'd always be bathing until the diner at 18pm.
It also took me a while to figure out why only some dungeons would be able to get those memory events at dusk. I assumed there was one for each area, but 2 areas have 2 events at different en lv progression and that also took a while to figure it out.
Now what I got really frustrated with was how to find the final boss..... It took a while to even figure out how to enter the Asae mansion, and after exploring it all, killing the bosses and finding out the hidden room of the girl, I assumed that I hadn't enough progression to unlock the door to what seemed a really big crack in the wall behind a card box.
Turn out you needed to go the secret passage near the 3rd boss and go back inside for a hidden stair to the basement to appear...... That was totally unecessary, and I had to find a walkthough to discover that. Because in my mind I had already completely explored that area.