The Killer Turned Bodyguard

After being reborn, he found himself in an unknown world. He nearly died right after his rebirth, and only survived by going mad. A rough man took a liking to him and put him through brutal training until he became an assassin. He thought this was how his life would be from then on, but unexpectedly, he was later forced to change careers and become a bodyguard.

A sweet story, with plenty of sweetness!