Fun, Fun, Fun: Road>Town>Small Shop>Steal>Town>Dark Street>Talk>KILL>Road>Forest>Go Deeper>LEFT LEFT RIGHT LEFT>Yes>Forest>Go Deeper>RIGHT LEFT LEFT LEFT>Shack>Yes>Battle: "Heal" until your health is with 280~300 HP, then "Tire" him until you can spare>Abandoned Shack>Basement>Glowing Shard>Leave
I'm still trying to discover this new secret ending, hope it helped :)