Final chapter of . In the early twentieth century, Russo-Japanese War veteran Saichi “Immortal” Sugimoto scratches out a meager existence during the postwar gold rush in the wilderness of Hokkaido. When he stumbles across a map to a fortune in hidden Ainu gold, he sets off on a treacherous quest to find it. But Sugimoto is not the only interested party, and everyone who knows about the gold will kill to possess it! Faced with the harsh conditions of the northern wilderness, ruthless criminals and rogue Japanese soldiers, Sugimoto will need all his skills and luck—and the help of an Ainu girl named Asirpa—to survive.

Next to Miyu Suzuki, a trendy and bubbly high school girl, sits Yuusuke Tani, a quiet and frank boy. Their interactions are brief, limited to Suzuki's unprompted random questions and Tani's succinct answers. Yet, beneath these simple exchanges, feelings of love are quietly blossoming. Suzuki sees Tani for who he is: a straightforward boy who respects everyone equally, completely unconcerned about fitting in. Unlike Tani, she is too hung up on what everyone else thinks, desperate to keep her crush a secret. However, a slight misunderstanding leads to Suzuki confessing her feelings—and to her delight, Tani feels the same. Jittery with excitement, the young couple starts dating, embarking on a wonderful journey of friendship and love.

Every time Yoi Takiguchi so much as lets out a sigh, her female classmates squeal in admiration and awe. She has been dubbed the school's "prince" by virtue of her boyishly attractive appearance and casual disposition. However, she chooses to be indifferent toward the attention she receives and spends her days normally—that is, until the school's other prince, Kohaku Ichimura, waltzes into her life and calls her beautiful. Kohaku is nothing like a prince—he acts thoughtlessly and does as he pleases. But when he compliments her, Yoi feels flustered, and the way he looks at her gets her all nervous. He is the first boy to acknowledge her as a girl, and her attempts to distance herself prove futile as he seems to have set his sights on her. While Yoi keeps telling herself that it is nothing serious, even she cannot completely ignore the stir Kohaku causes in her heart.

When Arisu Yamabuki was all alone in bed at night, he was able to find solace in the voice of a radio host who went by "Apollo." However, one day, she simply stopped broadcasting without any explanation. Years then passed, and Arisu is now a second-year high-schooler. He makes it his mission to search for Apollo, as there is something he wants to tell her. He doesn't know what she looks like, or even what her real name is, but he manages to get some leads on her in his school's broadcasting club. That's where he meets four girls who all dream to get a job where they can make full use of their voices! Just who is Apollo, and how will those four's dreams pan out?