The Prince (слэш)

The mother of the twin heirs to Celestia’s throne perished in childbed. Soon after they were born, one of the twins was promised to Rex Lapis (a Teyvatan deity, the Dragon King of Liyue and High King of Teyvat) as a spouse, to foster an alliance between Celestia and Teyvat, and to consolidate power in the face of growing threats from the Abyss Order, as well as the expansionist Tsaritsa and her scheming Harbingers. By all accounts, Rex Lapis is wise, benevolent, and unerringly just. But it is also said that he is hard-hearted, and incapable of love. Many years have passed since the contract was made. Princess Lumine has been abducted and slain by the Lord of the Abyss. Prince Aether's father, the Celestial King, forbade him looking into his sister's death, not wanting to lose both children. But Aether has just come of age and is sent to Teyvat, to become the spouse of this Dragon King. Perhaps now he will be able to discover the truth of what happened to his sister.
 
READ THIS NOTE: This fic has multiple ships. Other relationship tags will be added as they come up, which they will. Pay attention to the tags. I believe I have handled the subject matter respectfully, but please proceed with caution.