Sumiko Hikage, age 33, is a devoted idol otaku.
The long-awaited Budokan concert of her favorite idol group gets canceled due to a scandal involving one of the members.

Crushed and disillusioned, she aimlessly wanders the streets—until she catches sight of a street idol named Chika and is struck by divine inspiration:
“I want to support this girl!”

However, the two of them get into an accident shortly afterward…
And when they wake up—they’ve swapped bodies!?