Lisara Restall, a first-class Grim Reaper, sneaks into the human world hunting a target she keeps to herself, and comes up empty after an exhausting search. When Ryousuke Kaga, an ordinary high school student, offers her food and a place to stay, Lisara responds by embracing him without warning: the first move in a strange, forced-together relationship neither saw coming. Word of the arrangement spreads fast, drawing in other women like Quele Sellier and Mina Okura and turning Ryousuke's quiet life into a crowded, chaotic household.