Koharu Fuyutsuki is a university student who refuses to let her blindness define her life. Her infectious optimism soon draws the attention of the withdrawn Kakeru Sorano, whose guarded outlook on the world slowly begins to change after meeting her.

As their bond deepens, the two navigate the everyday challenges that accompany Koharu's condition, discovering that genuine understanding comes not from seeing with one's eyes, but from learning to see another person's heart.