Most likely yes, you can romance all the LIs at the same time
But do the LIs know you're with others or are you basically cheating on them all?
I will think about it carefully, for now I’d say I’m more inclined to choose the former.
I only like the option where the girls know and accept that the MC is with other girls. So when you know for sure, let me know and I'll know if the game might interest me or not.