Several millennia ago, in the highest heavens, an angel and a demon met every time, in the name of their love. However, when the rulers of hell and heaven found them, they cursed them: she will be forced to be reborn every time, forgetting her previous life, and if she were to remember it, she would die within a few days. He, on the other hand, will neither be able to die nor grow old, he will always remember everything. The two meet in all lives, they will fall in love again and suffer again.