Are people really going by solo route on this one ?
From the artworks, the fact they each represent one of the five sense and the momentum it feels quite clear it's going to end in harem with her sharing to each one the human sense they each love (smelling, touching, tasting
, etc...).
Since japan doesn't have married same sex law, being a couple or in a poly relationship is as much recognized and they all seem quite free of mind.
And as our FMC has shown the last chapters she "got it" to rizz them all at the same time.