A witch was cursed trying to save the ones he loved, and the prince who loved him chose not to let him bear that curse alone.
Source: nothing but time, by ficklish – 魔道祖师 – 墨香铜臭 | Módào Zǔshī – Mòxiāng Tóngxiù [Archive of Our Own]
This is a bittersweet fairy tale, a perfect little gem.