One night after a string of bar-hopping, Kōji passes out in a heap of trash in the rain. He is found, taken in, and cared for by Takuto Izumi, a soccer prodigy. Despite the fact that Izumi is a complete stranger, he moves Kōji deeply, and Kōji soon develops an intense obsession with Izumi. It is later revealed that the reason Kōji sings is to find the person he fell in love with at first sight six years earlier, whom he remembers for showing extreme ferocity on the soccer field and for a particularly penetrating gaze. Kōji knows the person's name is 'Izumi,' but he thinks the person he saw was a girl, so initially he believes it was Serika Izumi, Takuto's sister. It is only when Takuto looks at him angrily that he realizes Takuto is the 'Izumi' he was looking for. His body goes into shock, and from then on his obsession with Izumi knows no bounds.