Non ability au... Mori as a surgeon, a real proper surgeon in hospital... Who come back to Japan because someone need his help. There's someone important need surgery and it's rare condition and Mori is like one of the few surgeons who had done it in the past and successful... And it's gonna be in the hospital where Fukuzawa is the owner... They were having brief relationship when Mori was started as young doctor and Fukuzawa worked in administration (his father wants him to know of the hospital from the bottom). Fukuzawa is the owner of the hospital but the CEO and directors are all doctors. And since it's like important surgery, Fukuzawa also gets to know the preparation and all. Actually, he doesn't need to be there too often, he's just curious, okay.