Absurd/comical plot. Borderline pornographic. Main characters are kinda likeable. Reaction shots are excellent.
Read if: you are a hetero male who uses bizarre methods for studying Japanese, or who feels drawn to crazy facial expressions on weirdo characters.
Avoid if: you have any self-respect, value the purity of your eyes, or require anything other than sexually-provocative drawings to keep you going in life.
Longer review:
The premise is absurd: 1000-year-old virgin demon girl with big boobs, who can't admit her romantic ignorance, goes to highschool in an impossibly short skirt (if you have to ask, you're in the wrong place). She gets attached to a boy who is (generally) single-minded in his devotion to her, and the comedy comes from the strange progression of their relationship, with a bunch of characters who are borderline insane but mostly supportive. You've seen it before.
The art is solid; in particular, the reaction shots are cleanly drawn, beautifully expressive, and widely varied. One thing that feels unique is that the boyfriend is... kinda cool. He rolls with everything, is honest and open with his perversions, and is fundamentally devoted to his lady. Their relationship actually progresses and everyone seems to be mostly enjoying themselves.
I follow this manga because, as a student of Japanese, I can use sketchy websites (*cough*klto9*cough*) to follow both the original and translated manga for reading practice bolstered by T&A. There's a lot of interesting wordplay (even the title); if you're me, it's good material.
