Reality of a harsh world - naruto

He's a medic. He shouldn't be here fighting on the front lines. He should be healing yet here's here being put in a situation being forced to kill. A moral dilemma which he has been trained for his entire life yet he didn't think he'd be. But he was armed with two things. His refusal to die and the lessons he had learnt along the years. Those two things would mean his survival.