I really love this manga,i read it straight after the "Megumi no Daigo",in this manga we can see a very passionate young man who returned in past after his life became worse,his dad died,his wife divorced him and his sunshine was taken from him,and that was his job.After all of this,a woman that he saved in past,help him,so she send him in past,where he just became an "monstrous surgeon",that saves the life af a lot of people,including important figures.This is a great manga to read if you search for a manga in that the mc is very skilled and has a slow romance line.