This chapter have some elements related to torture. So if you are not comfortable with it, feel free to skip this chapter. I will tell a very very small summary of this chapter in the next chapter.
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The reason why she went to Youel before punishing those vermins was for only a single reason. That was because to give them needed punishment she was going to take them to her mini world which was equivalent to taking them outside this world. It was not an acceptable thing to do in any world without having the permission of the people managing that world.