When a young girl discovers an ancient time capsule containing a mysterious key, she embarks on a quest to unlock the secrets of Ooshima Towa and the Time Capsule of Dreams, only to find that the past and present are intertwined in a way she never imagine...

In a world where parallel universes intersect, Ooshima Towa discovers the truth about her alternate self, leading to a heart-wrenching confrontation with her own past and future....