Okay; that's a sick color page. Haiji looks so cool!
I don't know why, but Chiwako's design works well despite its simplicity, rather like Haiji's. She almost reminds me of Yoru. Since it seems like abilities are inherited in this manga, I wonder if she has, like, a charisma / intelligence boost or something. Moreover, I must mention that she is a baddie.
Hopefully we will spend some chapters focusing on the medical side of things in the future, or at least have it be relevant to the plot in ways other than "he saved a person again." Otherwise, this would not be too different from Sakamoto Days. I would probably enjoy this even then, but it would be wasted potential.
Overall, a solid second chapter; it did not develop many things plot-wise but definitely will sell people more on the characters.