You're right and obviously more experienced in this topic than I am. I build it in a way that two girls have a friends with benefits thing and the MC can have both of them so I automatically thought it would be harem-ish? I could remove the harem tag but in the end the main characters still will be able to have every women which would mean that it is a harem?
I could potentially say that the girls with benefits break up and at the end are still both inside mc's harem?
The LIs won't have deeper relationships with others though, that's not planned.
Need to think this through!