I Came Home from Intertwining Worlds and Worked as a Bodyguard for My Sister.

Where are the intertwined worlds... After returning home after experiencing life and death, I found that ten years have passed! My lovely eleven-year-old sister is now twenty-one! Still a girl group star! Now I, who only know how to fight and kill, have to rely on my sister for food? ! There is no way, who asked me to pamper her! He had no choice but to stay with her as a bodyguard to protect her. After all, his incompetent brother had been gone for ten years and was of no use except for being invincible in combat... Wait, something is wrong! Obviously my sister's sister is a celebrity and she followed me yesterday, and my sister, why do your friends in the girl group look at me wrong? ? ? Well, can this rare and peaceful life not be broken... Even if the world comes, I and my sword are still there! ! ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.