Shō Amano, a middle school student and astronomy club president, frequently squabbles with Arisa Sakura, the fortune-telling club founder. He conceals a divine identity as the modern incarnation of Hades, Greek god of the underworld. Unlike other reincarnated deities at the school, he possesses complete memory of his past existence, including his previous relationship with Persephone.

The tragic loss of Persephone in his past life shapes his present motivations. Upon discovering Arisa is Persephone's reincarnation, he recognizes her instantly, despite her lack of memory regarding their shared history. This fuels his unwavering determination to protect her at all costs, aiming to prevent a repetition of their past tragedy.

His protective stance directly opposes Zeus, another reincarnated god who seeks to exploit Arisa's unique power—the ability to revive the Titan—for his own purposes. This conflict positions Shō Amano/Hades as Arisa's primary defender against divine threats, engaging in struggles to shield her from manipulation.

His relationship with Arisa involves a destined romantic connection that transcends lifetimes, complicated by her initial unawareness of their past. Throughout their interactions, his actions remain focused on ensuring her safety while navigating the reemergence of mythological forces in their contemporary setting.