A nameless ordinary human protagonist is living a mundane daily life when a bizarre entity suddenly appears: a being with an alien-like head who introduces themselves as Earth-san. From that moment, everything changes. Earth-san showers the protagonist with overwhelming affection and possessive attention, turning their world into a whirlwind of surreal romantic comedy. But Earth-san’s motivations run deeper than mere infatuation, hinting at a hidden reason for this cosmic crush. The situation grows even more complicated when other celestial beings—Moon and Sun—also manifest, each with their own designs on the protagonist. Caught between these personified heavenly bodies, the human must navigate a life where the entire solar system seems to have fallen in love with them. The story blends everyday life with absurd otherworldly romance, exploring what happens when the forces of nature become intensely personal.