Sorry... im dropping this. I dont like to read stories when the MC, which suppose to be the one u like the most is actually the one u despise the most.
It works for me because Ryuu is
by far the character I despise the most. Koharu is a credible and sometimes likeable mess of childish contradictions, which works pretty well for a youthful, non-hero protagonist.
As for the rest, Madoka is a tearful beige doormat, and Yuzu is a generic fantasy sex object. At this point, neither of the latter two has been developed enough to matter. They're just narrative furniture.