5人の兄弟子、6歳の末っ子を大溺愛

Six-year-old Millie trains with a sword twice her size under her master, about to ascend to a higher realm. Before leaving, he sends her down the mountain to reunite his five legendary apprentices—a celestial sovereign, a dragon slayer, a northern guardian, an alchemy master, and a demon hunter. Each brother melts for their little junior sister.