There're two ways.How do I know if I 100% the game? Thanks in advance
1.Donate money to the offering box in the mountain 15 (or maybe 20) times. Then a switch appear after clearing the game, which will unlock everything.
2.Conquer all main and sub heroines. And then fill the main heroine's status gauges to unlock more event's. If you manage to unlock all of them, you'll get the special 'pancake' event in the night before ending.