@NeroPR No... All the girls said goodbye to their future selves with Kogarashi. You know what that means. They understand they Yuuna and Kogarashi have been together countless of times and their love is the true love. And Kogarashi now realizes it after so many times they are together. How she keeps from passing on is the mystery. She probably gets a her body back somehow and they can live a normal live at the inn with their friends. Doesn't mean there wont continue daily accidents of tripping into each of the girls crotches.
also, yeah. This Kogarashi should not be the real, original one. He`s just a merge of their perceptions of him(+ a little bit of his original soul, but mostly just images of him from their minds)