This Guide is Scary!

A guide perfectly suited for Haon, Korea's only S-class esper, appears as if by a miracle. However, that guide is the worst criminal in history, arrested for killing 34 people five years ago! He ends up living with him, but Haon is terrified of this guide. Will he be able to get along with him? *** The man was wearing a straitjacket. Both arms were firmly fixed to the garment, and his body was not so much seated on a chair as it was fixed to the wall. It was obvious how dangerous they considered him to be. The straitjacket, well, okay. He was a dangerous person, after all. I don't know how much more dangerous he could be than an S-class esper, but he was also a notorious serial killer. ...