I watched until episode 9 but then my patience drop to the ground. Adoptions from Visual Novels, especially Otome-Games are more or less the same. The female main-character is 'weak', teary and credulous. Koharu is exaggerated like this. The story is okay, but long-winded and foreseeable. The tension is often really short and not that special. Unfortunatly the story is facile, also the characters and whose past.
Short: Not a good anime. I like and watch other animes, which are adaptions from VN, but not one anime, was like that horrible including the main-character.
But -> Watch it, and build your own opinion! (:
