Japanator: "Bodyswapping is a classic trope of anime. It was nearly done to death back in the 80s and 90s, used as a filler plot device that appropriately associated it with a poor episode to come. Then, the whole genre died off -- or perhaps morphed -- as things such as traps, genderswaps, and their ilk took rise. Not that it ever became a popular genre or anything, but these were all still reliable tropes.
And then comes along Kokoro Connect, which put all of its chips down on the body swapping trope. 13 episodes or so, all exploring what was normally nothing more than a gag plot device."