Kim Jongin, who prefers to be called Kai, is a lost mind. What is a lost mind? And how is he 'lost'? A lost mind is a mind without a person. A person always has a mind, right? Well, Kai used to be someone's mind. That is until the person had disappeared, leaving him stranded in Seoul where he no longer has a person. So from then on, he became a lost mind. Cluelessly roaming Seoul, Kai is having fun but is s