In the quiet confines of his modest apartment, a struggling student named Shinji experiences an astonishing disruption to his rest when a brilliant light suddenly fills the room. From this unexpected glow emerges a beautiful young woman whose arrival seems both mysterious and otherworldly. As he awakens to the scene, she reveals herself as Yuria, an alien traveler who has come to Earth seeking her missing elder sister. Their chance meeting sparks the start of an unusual bond between them.