What an emotionless ending, really
If she just left Koharu like that, she really feel like a lolicon, also, about Mizushima, there was just nothing to indicate she would be the "winner" it just feels random
I think the author was just scared of actually going with the lolicon theme till the ending, but what was the price of stopping? Simply destroying all the story you made so far, really, the author ruined the story in 5mins by doing one thing, just like the ending of Oreimo anime, gosh, if you are going to make your whole story be about something, don't take one step back right in the ending, it is just stupid, I just feel baited by this manga