An old street with a sizzling atmosphere, a sea of wheat that seems to last forever, and a lightless business district. The smell of gunpowder can no longer be felt as of now, but its traces have surely become indelible wounds engraved throughout this world. In the midst of the seemingly eternal lonely scenery, the two travel to anywhere they want to be, needing nothing but an occasional warmth felt by the other person's touch. It was a journey that “digs back into the past”. A boy and a girl with mysterious power - Kamitaira Rei and Inamori Aruru. They, despite some rebellious moments, continue to move forward To uncover the history's hidden truth, To unearth the feelings of people who are intertwined Eventually, the scattered pieces become one big flow, Marking the beginning of a new world...