You won't close any girl's path unless you intend to do so (like choose 'leave' while the other option is 'stay'). But different paths do lead to different cg. Rather than losing it, you just get to see another one.
Viewing post in Heliorise Episode One [0.2.1] comments
First of all, if you want to make a harem game, don't make people choose between LIs. It's fine (and even good) to be able to choose whether you're interested in each LI individually, but making people choose between having a scene with one LI or another is a terrible idea.
That said, I hope we can avoid the relationship (and sex scenes) with the girl at the beginning (the one who looks like a devil).