People are throwing a hissy fit over under-aged people having relationships as usual.
Don´t get me wrong i understand people find it unpleasant as most modern social standards consider it to early.
But a Fantasy story about a different world having social standards being different is not that odd.
And it is not gonna stop me from enjoying the hijinx of a man exploring the world with a car.
From a historical point of view it was not even that uncommon,some madmen even thought 7 was ok once upon a time.
MC having the backbone of a wet noodle is the bigger issue IMO.
If he finds the whole thing uncomfortable(which he seem to do ) he should say so instead of just doing nothing.
And if not, fuck social preconceptions and do whatever you want.