Raised in the hope that I would be a boy full of courage and strength, they named me "Yuu." To be a girl filled with kindness and love; that's how my twin sister, "Ai," was raised.

That's how our parents named us-But… Our parents' wishes were reversed.

A story about twins who risk everything to protect one another and to find his or her happiness in the switch they call twins game.

The series was so popular it was given a second one shot.