Maikuro ~Ore ga Watashi de Boku ga Atashi de~

The male protagonist, Kunieda Yuuma, lives a happy school life with his friends. One day, Yuuma says, "It would be fun if our bodies were suddenly swapped." Almost immediately, there is something wrong with their bodies.... Oh, their bodies are actually swapped! Who did it? What will happen to their school life...? [Edited from ErogeShop]