Junpei Kosaka is a high school student who despises cats and has an allergy to them. It just so happens that his high school crush is Kaede Mizuno, a girl who adores cats. One day, while walking home from school, Junpei kicks an empty can and unfortunately beans the local guardian deity of cats. He finds he can now understand what cats are saying, including his family's own ill-tempered cat, Nyamusasu. Now, if he does not grant 100 wishes from cats, he will turn into cat himself.