A promise from a distant past. You and I— Invited by the dying Garuda, Shouu and Tamamo-no-Mae find themselves peering into a world of the past. It is a forbidden past where Sasami-chan aims to become a "real充" and her older brother gets caught up in a harem romantic comedy!! What is the true wish of Vishnu, the supreme god of Indian mythology, who has transformed into the "God of Destruction" Shiva, attempting to alter history and intervene in the past—? A story of a distant promise witnessed by Shouu and Tamamo-no-Mae as they transcend time and space. The illustrations are done by Hidari, who has also worked on the illustrations for the novel "Usotsuki Mi-kun to Kowareta Ma-chan," the anime "Natsuiro Kiseki," and character designs for the game "Ayesha's Atelier: The Alchemist of Dusk." This is a highly anticipated work that has been announced to be adapted into an anime by TBS and BS-TBS!