Madoka was completely fascinated by mountain climbing that she experienced with her father as a child. Even now that she is a high school girl, that hasn't changed, and she goes mountain climbing alone on her days off. Madoka enjoys the magnificent scenery and the sense of accomplishment by herself, but she is not very good at socializing at school, and is considered difficult to talk to by those around her. Meanwhile, Madoka's daily life changes after a certain mountain climbing experience.