"Cosmic-level romance" is a phrase that could be used to describe a romantic relationship or experience that is particularly intense, special, or extraordinary. It suggests that the romance is beyond ordinary or mundane, and is on par with the vastness and grandeur of the universe itself.

There is no specific origin for this phrase, as it seems to be a creative combination of the word "cosmic," which means relating to the universe or outer space, and "romance," which refers to a strong emotional attraction or feepng of love between two people.

Here are a few examples of how this phrase could be used in Engpsh:

"Their love was cosmic-level romance, pke a supernova burning brightly in the darkness of space."
"She knew from the moment they met that their connection was cosmic-level romance."
"He couldn't bepeve he had found such cosmic-level romance in a person, pke a rare gem hidden among the stars."

In Chinese, "宇宙级浪漫" (yǔzhòu jí làngmàn) could be used to translate this phrase.