I Am a Medical Saint in the Ninja World, and the Bosses Are All My Guinea Pigs

I want to become the strongest medical ninja in the ninja world! Medical ninja? Isn't that very weak? The students whispered. Sarutobi smiled slightly: Who said medical ninjas must be weak? I want to create unprecedented medical ninjutsu! Every classmate thought that becoming a doctor in martial Konoha was a joke, but little did they know that this was the beginning of their "Konoha" nightmare. Start by studying adrenaline, and use all the big guys in Konoha as 'guinea pigs' Sarutobi formed a genius team, including Orochimaru, Tsunade and others. They trained together and studied ninjutsu, and Sarutobi secretly used them as experimental subjects. Whenever it is quiet at night, Sarutobi will open the mysterious reincarnation warehouse and start exploring the unknown 'evil'. Extending life and resisting death, this is the ultimate pursuit of ninjas! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.