Parting is such sweet sorrow. But it's also bitter. I enjoyed it, and glad Yui has the courage to follow her own path. And all it took was a killer gynoid to inadvertantly teach her that. I expect great things from this author in the future.
I think this was introduced as a short series from the start. Ending could've been better.. kinda simplistic.. and they kinda went pretty deep into manaka's motions and potential growth for this kind of ending.