You've heard of foreign exchange in high school, but body exchange? Having seemingly been caught up in the whims of a supernatural character called Heartseed; Taichi, lori, Himeko, Yoshifumi and Yui are about to learn more about each other than most. Not only are they switching bodies, they're switching genders! Now they're truly discovering things about each other, including stuff that go beyond basic anatomy. Every member of the Cultural Study group is hiding something, but how long can it stay a secret when their body is no longer their own, and they can't keep watch 24/7? It just might be time for them to face their demons.