I've read it several times, and it's beautiful. Story: Only you can heal yourself. All your worries are caused by the "other you" living in your heart. "I can't clean my room," "I'm too busy and don't have time," "I can't say what I think to others," "I can't save money," "I'm working hard, but I'm not getting results"... Things you can't seem to solve. Things you always repeat. These problems and worries are caused by the "other you" living in your heart. And the reason isn't to be mean, but to "protect you." For example, "I can't clean my room" is to prevent the feeling of anxiety and impatience from surfacing when your room is tidy and your mind is clear. "I'm too busy and don't have time" is to prevent the possibility of "I can do it someday" from disappearing if you have free time. In this way, the "defense mechanism of the heart," which is the "other you" that causes problems to protect you, is called "Knight-kun" in this book. To solve your worries and do what you really want to do, you need to find your "Knight-kun" and reassure them.