Funeral home employee Kanzaki Kazuo was admired by his childhood sweetheart Nozomi Kotone, who was 8 years younger than him, but she actually caused the most serious terrorist incident in history.One was killed by someone during the investigation of Kotone. He went back to the past and confessed his feelings in the past. He became a lover and lived with Kotone, and ran around to prevent that incident from happening to her...