Noriko has led a sheltered, overprotected life since she was little, not being allowed to play outside or take part in normal childhood activities due to her affluent background.

Then, during a school trip to Osaka, she meets Taiyou, who shows her that beyond the gilded birdcage she was raised in, there exists a dazzling world that shines as bright as the sun.

But, faced with overwhelming opposition, can Noriko somehow find the courage she needs to break free of the chains that bind her?