Valuable
In the middle of the ground is a shellfish that is very valuable. Inside of this valuable shellfish is a priceless treasure, and it’s just lying there in the middle of the ground.
Look at this valuable shellfish. What could be inside? Pick it up and shake it about, trying to guess what valuable thing is enclosed.
き
とうと
None
You want to get the valuable thing from inside the shellfish, but it's locked and you need to find the key (き). Search for the key!
You find a bunch of keys, so you try to jam them all into the shellfish one by one, hoping one of them is the right key to get the valuable, hidden treasure.