Just binged this today, thanks to all the people/groups involved in all the chapters!
Now, it is a pretty damn good manga, and the character design (at least for the girls) is insanely good! Even the two background friends are amazing.
Sadly, I really wish this little cunt of a childhood didn't appear... Now matter how cute (and slightly hot) she is, she's just a big annoyance. And I sure would've enjoyed the wholesome relationship of our two mains to develop slowly and nicely without this plot device shenanigan. But hey, maybe she'll turn out to be a good character....
I just hope the author doesn't bring in more rivals, for the love of all that is Holy.