Rebecca imagined many things after finishing university; dying was not among them.
Being reborn as the twin Sister to a different worlds Hero, and dealing by default with his opponents certainly wasn't what she imagined either.
English is not my first language, so there will be mistakes. I will try to avoid them but make no promises.
----
The world this story is playing in, and the characters that are in the original story all belong to Tang Jia San Shao.