Not just her, some of these heroines really have nice male side characters they could pair up with (like Banchou x all-I-have-is-strength man / the guy who dropped out of school, Tsubaki x Iinuma). Only ones who really lack a partner are the 2 Onishima heroines Yui & Raino.
Edit - Huh, the next chapter says
so apparently her crush on Rokudou is over...