In the ruins discovered at the end of a long, underground tunnel in Mifuneyama Rakuen, small microcosms of accumulated space times are spread. A group of butterflies in the microcosm dances beyond the boundaries of the time and space of the ruins.

The forest above the underground tunnel is home to 3,000-year-old trees, and it changes daily with the imperceptible, slow flow of time, repeating every year, as a space where the endlessly long time accumulates. The ruins from ages past scattered in the forest and the Edo-period garden which remains today each have their own respective space-times. The forgotten underground tunnel is a space-time where time has stopped completely.

And the microcosms that are spread through the ruins of the underground tunnels also have their own space-times. Here, various space-times intersect and overlap.