Ichinose, a violin music student, approaches a crossroads in his life. He must decide what to do with his future, yet he feels no pull toward any specific dream. Lacking ambition, he chooses to work alongside his mother, a piano teacher, and teach violin. However, one night, he spots a pretty, sad girl standing barefoot outside an apartment. A bit of investigation reveals that she appears to share the apartment with a cat and a mysterious guy named Mike. Will meeting her be the trigger that changes his dull life?