Sister Nagi Is the Savior of All Worlds

[The original post had no inspiration, so I changed it, you can take it or leave it as you like] Nagi Mayuri has a twin brother. That guy named Nagi Seishiro is a genius. Even if you lie down and do nothing, you can easily achieve good results in various fields. On the contrary. The younger sister is frail and unresponsive. Although they have similar personalities, mediocrity is the original sin. So, at the age of five. Mayuri, who longs for transformation, signs a contract with a strange biological system and becomes a savior who changes history. She worked as a healer for Muzan, the youngest son of the Yuyashiki family; Holding the famous sword Tsurumaru Kunei, he killed hundreds of demons; Saved the Kuluta tribe from destruction, and also saved the tragedy caused by Chimera ants; Join forces with the Six-Eyed Eyes and the Super Spell Spirit to create a new order; End the century-old feud between the Joestar family and the blonde vampire. … When she came back to her senses, she seemed to have become a very important person. Mayuri:...... Although but. Her initial goal was to save enough money before adulthood and then spend her life leisurely! * Complete the mission and step back with success. Mayuri, who received a large bonus, stayed at home and became a game anchor. Across the Internet, she took off her mask and spoke the truth. "Yes, I prevented the birth of the ancestor of evil spirits and made him change his ways." "The famous sword Tsurumaru? I've used it before!" "To tell you the truth, I have also eliminated terrifying ants that can simulate humans and saved countless lives." "Are there any monsters? I have encountered curse spirits. One of them is Volcano Head. I used him to eat hot pot." "Vampire? Super weak, okay, I've beaten you into a little bun." One day, Mayuri received a text message from her brother. [Mayuri, she met a very rich young master, and he said that as long as we play football with him, he can take care of us. The girl silently put down her phone and glanced at the man standing outside the door with a complicated expression—— The president of the Blue Higanbana Group, Mr. Kuninaga, a senior political figure, the heir to the Hakka family, the head of the Gojo family, the adopted son of the noble Joestar... And others. Haha, she is no longer short of money now. All I need is a life to escape from their hands :) Reading instructions: 1. A long novel, a long novel. I started writing it when the heroine was five years old. Writing long novels is my destiny. 2. There should be another series, I'll think about it slowly. Mission: A good childhood can heal a lifetime