Arc 1Yunyi and the Saegusa Sisters
Liu Yunyi entered First High School undercover and drew attention through his magic and his connections with Tatsuya Shiba and Mayumi Saegusa. After an attack exposed his destructive abilities, he threatened that he might destroy the world if his goal failed, while Mayumi concealed what had happened from her father.
- Liu Yunyi enrolled at First High School and immobilized Shun Morisaki, several Course 1 students, and Mari Watanabe during a confrontation over Miyuki Shiba.
- Yunyi described his ability as Kotodama Magic and received approval to adjust his undercover plan while avoiding premature involvement with the Ten Master Clans.
- Yunyi sparred with Tatsuya Shiba during an assessment, and Mayumi Saegusa approved Tatsuya for the Public Morals Committee.
- Yunyi reunited Kasumi Saegusa and Izumi Saegusa with Mayumi Saegusa, then protected the sisters from a restaurant attack using Fool's World and Fire Dragon's Roar.
- Yunyi took Mayumi Saegusa to the attackers' stronghold and destroyed it with Heavenly Fire Burns the City before releasing the sisters the following morning.
- Yunyi accepted work helping Mayumi Saegusa in the student council room and explained that Fool's World controlled psions and manifested images from his memories as magic.
- Yunyi claimed he intended to conquer the world and admitted that he might destroy it if he could not achieve his goal.
- Mayumi Saegusa concealed Yunyi's actions from Koichi Saegusa, who asked her to convey the family's appreciation and visit Mio Itsuwa.