In a twist of fate, Kio's mundane life takes a thrilling turn when he encounters a captivating feline-human hybrid named Eris at a family event. Suddenly, he finds himself waking up to her presence in his bed! Eris, a visitor from the planet Catian on a mission to study Earth, chooses Kio's home as her base of operations. Little does Kio know, various clandestine organizations are determined to capture Eris, willing to go to great lengths to conceal her existence. To make matters more complicated, individuals in Kio's circle reveal their allegiance to these covert groups, posing a threat to Eris's safety. As Kio navigates this perilous situation, a blend of mystery, adventure, and allure unfolds in the world of Asobi ni Iku yo!