Naruto: Shirayuki with Sleeves Assists Terumi Mei

Naruto fanfic + mortal flow + single female protagonist + non-Konoha Li You was killed by his girlfriend's neighbor on his birthday. With his unwilling soul, he traveled to the young master of the Snow Clan with the same name in the world of Naruto. On the night of the genocide, his fiancée Terumi Mei unknowingly participated in the genocide. Li You fled to the Kingdom of Whirlpool. Li You began to become stronger with the help of Sode Shirayuki and the blood successor boundary that he brought with him when he traveled through time. He inherited the original owner's long-cherished wish and returned to the Kingdom of Water to help Terumi Mei become the Mizukage, restore the Snow Clan, and stop Uchiha Madara's Eye of the Moon plan and Black Zetsu to save his mother.