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World traveler Yu came to a world and began his life in this world. (This article deeply integrates multiple world views, including but not limited to Naruto, Jutsu Kaisen, and Honkai Impact.)

After humans successfully defeated Honkai, Bianca Hollander Atalgina actually traveled back to the orphanage where she was seven years old while sleeping at night, and her body's age also became seven years old. After realizing that this was reality and not a dream, she decided to save and protect the important people in her heart without changing the outcome of humanity's victory over Honkai in the future. When she met Ren Yu Mengyao who did not exist in her memory in the orphanage, while she was surprised by her appearance, she also remembered her deeply in her heart. In order to observe her better, she decided to pull her into the Blade of Immortality...

Yu is the childhood sweetheart of Destiny's strongest Valkyrie Bianca. Hollander Atalgina. When she grew up, she became Destiny's S-class Valkyrie. She was sent to the Far East Branch by Destiny's Bishop Otto Apocalypse and became a teacher at St. Freya Academy...