Reunited by the death of a friend, a group of former schoolmates reassess themselves and their earlier times together.

The Advent of Princess Kakyuu (Kakyuu-Ouhi Kourin) was the revision of the previous musical, but it also followed the Sailor Stars arc of the manga.

Koike Minami returns from USA to Japan to accomplish her deceased twin sister's wish to win a competition and sing with Avril Lavigne on the stage in a concert in Tokyo.