Naruto: the Underworld Embroiderer

Yushu is the direct descendant of the "medical and martial arts master" who was sent to the Far East island to take refuge before the Uzumaki clan was exterminated. A hundred years ago, in order to save a close friend, he violated the clan rules and used the forbidden technique "Life Embroidery Reincarnation" to exchange his life. My best friend is alive, but his hair turned gray overnight (his red hair faded). He vowed never to let the people he cherished pass away again, and embarked on a journey to pursue "eternal protection". He practices medicine all over the world and does not care about good or evil, only whether he should save someone or not. When he returned, the former boy had hair as white as frost and snow, but his face remained the same. Only when he is angered will his hair roots ooze red as blood - that is a sign of burning life, and also means that he will transform into "Shura".