Button Collection / Gaping Hole Secret"Gaping Hole Secret" is an installation that resides at Kurkku Fields in Chiba prefecture. Amongst farmland and the grassy fields stands a secret vertical tunnel that looks plain from the outside, but holds a wonderland inside. With a hole opening to the sky, you can enter a personal fairytale to set the stage for your imaginations. Take a piece of "Gaping Hole Secret" with you with this button set. This set includes 3 buttons that depict the details