A good example of how yandere horror stories should be done, in my opinion.

The story starts off in a very ecchi-ish manner, with bits of Kanade's craziness displayed here and there. This goes on for the first half of the manga, after which the story gets dark. There is no release in the build-up of suspense (as compared to something like Higurashi which has comedy here and there), and there is a very gradual descent into psychological horror with each chapter, indicating good pace. 8/10.

The art is great. It's very clean, and if you like boobs and girls masturbating you'll love this. On the SFW side, the characters are well-drawn, nothing to complain about. 9/10.

The characters aren't unbelievable and they complement the plot. The MC is the focus and the other characters are more or less in the background, and the MC's inner thoughts and feelings are well-developed. 9/10.

Overall, if you like yanderes, boobs, and psychological horror, you will like this. 9/10.