Oh, thank the gods; four wives is enough, and MC can just pass off the elven princess to the eighth prince.
The story already treats everyone not fucking the MC as if they are disposable tools, and not people; it makes sense that he could tie the "human hating" elves to the "elf hating" humans, and magically resolve all racism in the world by saying "tee hee" and claiming that love solves all problems.
I mean, the writer is obviously a mental child or infant, so... that seems like the perfect solution for somebody who thinks the world works like a game of let's pretend.
....
...
(... And since it's a poorly written trash isekai, the world basically IS a game of let's pretend... soooo....)