[Reborn in the Stars] Good-for-Nothing Mutant Beast

Over-the-top version:

An ordinary, good-for-nothing university student at a music conservatory is reborn two thousand years in the future, still good-for-nothing. His adoptive father has no choice but to give him to the heir of one of the three rulers, so he can take part in the selection of a consort. To everyone's surprise, he actually gets chosen. To escape this relationship, he runs away from his wedding...

Background version:

Two thousand years in the future, alien beasts run rampant across the stars and resist all high-tech firearms. As a result, magic, martial arts, and cultivation flourish. Chu Ling later discovers by chance that the musical scores he carries with him can also channel spiritual power to kill magical beasts, making him the first cultivator to control spirit beasts through music.

Bromance version:

Zuo Lang: We're already engaged. Would it kill you to let me top you once?

Chu Ling: Sorry, I'm running away from my wedding. I don't have time to fool around with you... Hey, hey, stay away from me... You... Mmm... Ahhh... @#￥%...

And so they got into bed, pulled up the covers, conceived a child, and had a baby...

A lighthearted, angst-free story with a classic wish-fulfillment golden finger and sweet romance.

Theme: Rely on yourself. Becoming independent and self-reliant leads to a better life.