Hiroshi Kuzumi and his wheelchair-bound younger sister Mana Kuzumi arrive in the town of Jöga. As they and their father, Masaaki Kuzumi, are moving into their new apartment, Hiroshi meets Isuzu Tsumuhana, a tomboyish girl who lives next door and immediately latches onto him, proclaiming her love. At school, Hiroshi is warmly welcomed by everyone except class president Nemuru Kushinada, who tells him that his very existence is annoying...