"Sing for me, little witch." Who would thought that an assassin like me will come to this? I'm just a badass that wants more strength, power. But not like this, I just entered a different world and my life changed. Secrets came out like in air. Answers appeared like stars. Unknown information flooded like tidal waves. Persons disappeared like bubbles. I thought, when it's all over my life will be back to normal. But, I was wrong. I didn't expected that this will have a massive turn in my life. Who knew that the most dangerous demon king would get involve with a normal person like me.