Take your fingers, put them on this turtle shell, and push push push! Push the turtle right on out of there.
You're trying to push this turtle out so you can use the shell for your new obi (お). You keep seeing other people wearing turtle shell patterns on their obi, but you're going to go a step further. You're going to MAKE your obi out of actual turtle shells! You just have to push this darn turtle out first.