This story follows the same art and style of storytelling as it's predecessor, Devil Honey. There is also no real way of understanding this manga without reading Devil Honey.
Although, this makes you think there is a focus on Minoru & Seto's relationship the reader is left feeling duped. However, not unsatisfied. As I said, if you have read Devil's Honey, you are introduced to Minoru's brother Yoshino and his love interest Toshimitsu.
You can't help to fall in love with them again. It's unfortunate they do eat up the time that the mangaka should have given to expanding Minoru & Seto.
What she does is start with Minoru & Seto in an advanced relationship when Minoru & Seto are already in University.
However, then she backpedals and spends more time showing us the outing of Yoshino/Toshimitsu's "relationship" when Yoshino graduates. When I think what she really wanted to show was the start of Minoru & Seto's relationship. Unfortunately, she fails at delivering on the latter.
I feel as though b/c this is a sequel for Devil's Honey, this works as a nice conclusion for the Toshimitsu/Yoshino pairing. However, as a start for the Seto/Minoru pairing, it is lacking.
I would read it since it is satisfying if you enjoyed Devil's Honey, as I did. It really is enjoyable.