The film "Summer Solstice Story" was produced in 1992. Now, with Aina The End as the new heroine, director Shunji Iwai himself takes on the task of remaking it. Through his unique style, characterized by the heavy use of monologues, the story depicts a summer day filled with love and madness as a girl awaits the return of her beloved.
Haru and Reo perform as musical duo Haru-Reo. With their indie music, they suddenly get popular. Even with their newfound success, they decide to disband the duo. Haru-Reo go on one last tour together. Their roadie Shima goes with the girls on the tour.
News about the disappearance of panties is still being covered every day. Kyosuke still wears Aiko Completo's panties to battle evil. Meanwhile, Aiko has mixed emotions and decides to get her panties back. Kyosuke suffers from the loss of Aiko's panties and disappears, but his biggest enemy yet is about to materialise.