Surviving on another Planet (BL) SoaP

Zhang Han crashes his spaceship on an unmarked planet in the outskirts of a solar system. After being rescued from death by a red-haired man, he finds a world foreign to him. One occupied by ferocious beasts and run by the wild laws of nature.

His rescuer offers a deal: He will teach Zhang Han how to survive in exchange for sex.

Will Zhang Han survive in such a primal world, and can romance ever develop from a casual fling?

ZH: Why are you staring at me?
ML: Cause' I'm bored. You look good~
ZH: Stop.
ML: Hey, you don't have to be so sour. I'm grilling your favorite fish for dinner tonight...
ZH: ...
ZH: Fine, *cough* stare if you want.

*1v1, mix of action, smut, and gore, switch relationship*
*rational MC x arrogant ML*