Ichiko lives the life of a hikikomori (shut-in) at her parents‘ home. However, when her sister gets a divorce and moves back home, Ichiko decides to move out and live on her own because they don‘t get along. The only minor happiness in Ichiko‘s dreary life is working at the 100-yen store where she can catch glimpses of an aging boxer named Yuuji practicing at a nearby gym. One day, the two move in together after getting to know each other better and Ichiko‘s life begins to change drastically as she takes up boxing herself.