A story about how I ended up becoming the lover of a girl who spoke condescendingly to me, after I nursed her back to health, even though she called me a "dog."

A boy named Riku, who loves soccer, meets a girl crying in the park one day. After caring for her when she collapses from heat stroke and offering to listen to her troubles, he somehow ends up being called a "dog" and becomes her confidant. For years, one talks about her worries while the other listens, but gradually their relationship begins to change...