Help me find this webtoon/manhwa

setting: historical/middle eastern s/ sultan/ harem
Plot:
- FL either has gone back in time or is given prophecy about the future and must protect the prince/Sultan

- she can't speak infront of the sultan/prince, but she is very good at singing

- the ML is curious about her but is mostly indifferent trying to remember where they met before
- she continously tries to escape from the sultan/prince

It's not the sultans lover