A love letter for your sweet heart, or perhaps a love letter from someone you deeply admire. Do you remember that nervous feeling when you sent a love letter to your love, or when you received a love letter and your heart beat so fast as you slowly opened it up? Perhaps you are experiencing that situation now. The craftsman who made this box tried to convey those exact feelings of excitment into the Karakuri box. The device isn't difficult, but you must decide how you will open this love letter that is sealed with a heart. “When you open this Love Letter your heart will be moved....”