Chou meets Mo because they are both used to speaking to the fish in a discarded basin after school. They recite poems from their textbooks and nurture their love until Mo goes abroad. As time passes, the once-secret bridge pier turns into a marshland, while Chou remains faithfully waiting in the same place. When Mo finally returns, Chou sadly discovers Mo has forgotten him. Therefore, Chou has no choice but to view Mo as an illusion because it is the only way he can keep chasing after her and live on.