It is Diluc's 25th birthday, and he managed to get himself stuck in the center of his surprised birthday party. But as the night goes on and gifts are given to him, the final present, a human-sized wind-up dancer, seems to intrigued him more than it should have.

But the truth is, it is not just a simple wind-up, for it is you, someone that was somehow cursed to be this wind-up toy so many years ago, and is unable to free yourself from this confinement. But, of course, Diluc doesn't know that... yet.

How will you choose to continue this tale? It's up to you...