Spoiler Alert
Yes, but not because it was what Bjorn wants. More or less like a necessity or smth like that. But tbh it's more of like an "it just happened" thing since people are convinced they were (Bjorn and the other women). I think it's similar to the story you mentioned, except that Bjorn and Misha had already done the deed once.
If
He
Only
Gets with one girl, I'd be fine with that. I don't consider that a harem. There could be multiple people vying for one person, but is that one person only picks one person and doesn't sleep with everyone (or anyone) else, I think that's kinda just a romance with a harem flavor. I can accept this. Thank you for the info!
Currently, the "harem" part of the story is at most nonexistent. The main reason why people are set on him having a "harem" is due to the fact that Bjorn's party members are mostly female. Bjorn also didn't deny that but is less interested in the "harem" that he created since his primary focus is on surviving along with his people.
I just want to clarify this part because it's bugging the hell out of me sometimes and finally I found the right words for it.
The "harem" is imposed. By rumors from the people who only sees MC as a barbarian surrounded by females, not a warrior surrounded by capable teammates. And it gets worse after he becomes a noble - talks about marriage and heir and factions among other issues. He'll try to find a way out of it because denying will only do him more harm than good - people will either get weirded or get suspicious of him.

Is this a harem? I'm starting to get vibes, but also Moon-led Journey Across Another World gives me hope that there can be multiple girls of interest and no romance (so far). Asking for spoilers from novel readers