"What’s important is not to run away! If we stop running, everyone can surely move forward!" Finally, Naname has reached Sora's "secret." At the art museum they visited during their social studies field trip, Naname challenges Ai to a battle. Together with the feelings left behind by Sora. Who will survive—the white devil or the black angel? This shocking elementary suspense, which won first place in the Bessatsu Friend magazine survey for "works that should be animated," has finally come to an end! The true ending is illustrated with a large number of additional pages!