Tsukino Aoi was bound to a system after time travel. It's not a big deal. It's a common cheat code that sucks.
However, her system is quite explosive in the entire system world. The full name of the system is [Crime Scene Cleaning System], which means that Kawano He is going to be a cleaner who specializes in cleaning crime scenes.
Kawano He:......
Purpose: People must abide by the law