Mafuteru Rei's Manga

Mc saves a bullies girl in exchange for teokkboki as dinner treat

Mc has a happy life with her husband and pets but then she died saving a student, God gave her a choice and she chooses to live her happy life again but she goes back to 10 years before she met her husband and pets. She tries to also get married to him in her new life.

Basically Light Yagami female version. She has teleportation powers and killed a bully which is the heir to powerful company and daughter of the most feared killer. She uses her powers to kill other bad people and other bully so they begin to be suspicious and connect the dots.

A great infamous assassin was betrayed by the person he worked under for and was killed. He was given a second life to be in a police officer’s body. He wants to take revenge and kill the monk leader.