Re:Zero All Sins - Chapter 57: Do we call it Isekai

When Li Xianyu was 20 years old, he received his father’s inheritance, an 18-year-old great-grandmother who was incredibly beautiful.

Li Xianyu: “Great-Grandma, why are you so young?”

Great-Grandma: “That’s because I died when I was 18 years old.”

- Description from Novelupdates

A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his rigorous discipline, in order to reach his goal: Resume his career as a teacher which he left halfway through in his previous life. This is the story of a man, who, based on the memories and the experiences of his previous life, became a teacher who travels through the world with his students.

Marked as cursed and a murderer after a mysterious death, Penelope becomes the Lockwoods' outcast. Despite the towns' interest in ruining her, the crown prince ignores all pleas not to court her. With the help of the prince Tyrion Castro, Penelope unravels secrets linked to her parents' past and reclaims her innocence. Betrayal, danger, and love collide in her fight for the truth.

One day, after five years of living in the shadow of the popular actor—Mo Boyuan, Dr. Jiang suddenly decided that she had enough!