Nagano, your cheerful childhood friend. You liked him since long time ago, but you have to endure heartbreak and jealousy for years because he fell in love with a disabled girl named Himari that he made his first wife. Now years after Himari's death and Nagano marries you, he is not someone you know from your childhood times.

On a rainy evening, he is sitting on the bed, mournfully looking at an old photo of him and Himari.