Arc 6The Saegusa Summer
Yunyi supported Mayumi through her departure from First High and the upheaval surrounding his nomination as Public Morals Committee chair, while deepening his ties with the Saegusa family. The arc ended with Yunyi and Mayumi vacationing with the twins, where an unexplained sense of danger left everyone on watch.
- Yunyi taught Miyuki, Honoka, and Shizuku his practical magic technique, then stopped teaching Miyuki when she resisted his instructions.
- Yunyi and Mayumi settled into a home life with Kasumi and Izumi, while the twins gradually grew comfortable with him.
- Azusa became student council president, Mayumi proposed abolishing the unequal school rules, and Mari named Yunyi her successor as Public Morals Committee chair.
- Yunyi confronted Tatsuya over Miyuki, fought him, and stopped when Yakumo appeared with Miyuki nearby.
- Koichi tested Yunyi and warned him and Mayumi to prepare for the truth about Yunyi to emerge, while promising not to oppose their relationship.
- Yunyi and Mayumi took Kasumi and Izumi to the Saegusa family’s island, where Yunyi sensed danger and briefly cut Tatsuya’s group off from Psions with Fool's World.
- Yunyi found no immediate threat, but he and Tatsuya agreed to stay alert as Tatsuya’s search of the island and waters also turned up nothing.