The story of Idol Memories is set in the near future, where live idol music performances in virtual reality have become commonplace. Against this backdrop, a pair of rival idol groups compete for the coveted "tiara," which represents the number one spot in the "Idol League."

A few days before Fox officially inherits the treasured heirloom in his family—a mysterious map, the Tufugu Pirates storm into his house and kidnap him, taking the strange map with them. Buta, a powerful mercenary, is hired by shady characters to help them seek the treasure. In a stroke of great luck, Buta and Fox meet in the underbelly of a pirate ship. Will Fox be able to convince Buta to save him, or will the fabled treasure fall into the hands of crooks?

The story centers around an illness-stricken, constantly bullied orphan girl named Minori. After one rainy day, she doesn't turn up at school, having been admitted into a hospital in a distant town. Two months pass, and the girl's two school friends, Takashi and Kyouko, receive a mysterious email with no sender listed. The email reveals a summer festival taking place at a nearby town...

The story of the anime will revolve around Dreamcast, Sega Saturn, and Mega Drive, who have just enrolled in SeHaGaga Academy at Tokyo's Haneda Ōtorii station. They are given an assignment needed to graduate by a suspicious teacher, and to clear this assignment, the girls need to enter the world of Sega games. The girls must try their best to graduate without incident. (Source: ANN)