Overcoming Fate with an Assassin System!

Lucy friend Jacob developed a level up system! He saved the world from the Demon King and became a celebrity! Lucy helped him skip classes while he was in school to fight and she even helped Jacob set up a date with her best friend Clara! Lucy helped him whenever she could... that was all she did. Only help, not do.

10 years after the defeat of the Demon King she bullet for Jacob. Helping him again. Dying Jacob confesses that he forgot about her, and he was sorry. Outraged but not being able to talk, Lucy regretted helping him. She was the reason for his university degree, marriage and hundreds of other things.

Just as everything goes black, "Wanna have another go? Yes? Let's do something different this time!"

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Note from author:
I know the chapters are insanely short, other books will have much longer chapters.