The Guardian with rabbit ears proclaims the sad truth."If your lost memories are not recovered, your soul will be destroyed."And so our protagonist Minori naturally begins to search for her lost memories.Little by little, the shocking truth becomes clear. Minori is actually...?A bus accident occurs with one of the twin sisters dying.Shiori and Minori fight over one body to be able to return to the real world with the help of their spirit guardians.The one to collect the most memories wins.