You watch five girls who know they're going to die, probably soon, and the show does something harder than grimdark: it lets them be happy anyway. The world has already ended once. These girls are living in the aftermath, and every quiet moment between battles, cooking, laughing, falling in love, is an act of defiance that the show treats as sacred. Wilhelm arrives as a stranger who sees their lives not as tragedy to fix, but as something worth protecting, and that changes everything about what this story actually is.

Humanity fell five centuries ago to creatures called Beasts, leaving only scattered races clinging to survival on floating islands high above the world. A group of young girls called Leprechauns wield the only weapons capable of holding back these monsters, though combat means they live constantly on borrowed time. Into their lives comes Willem, a warrior who woke from a long slumber in ice to find himself the last human alive, having lost everything in his final battle. No longer able to fight, he takes a job overseeing what he thinks is a storehouse of weapons, only to find the weapons are the girls themselves. Instead of fighting, he discovers something harder: how to be a father to children who see themselves as tools of war, and how to wait helplessly for them to come home from battle. What unfolds is equal parts gentle domestic comfort and creeping dread, as Willem and the girls come to understand what family means and what is truly worth protecting.