During production, 2DM staff referred to this doujin as “Freaky Friday”. If you don’t get the reference, google it. If you do, you probably got it right that the premise involves body switching.
In this case, the target are a pair of Mucha’s favorite lesbian Precures: Akira and Yukari. And as soon as they switch bodies and go back home, they start “exploring” each other’s bodies.