I like female characters who are yanderes/obsessive, but I think it's especially good when the love is reciprocated. This one, like Koharu no Hibi, the love is reciprocated, but in this case, it's more interesting because, like FL, the MC has a twisted mind, too, making the relationship between the two very different and interesting. In short, the story involved me and hooked me throughout every chapter. For the ending, I was expecting and wanting something tragic, and I think that would fit better with the feeling the work conveys. However, it was still an acceptable ending that will probably please most people (but notme, who found it very common due to the strangeness of the work).