On the night before the long-anticipated imperial banquet, Seria is unexpectedly afflicted by a strange condition that causes her to start lactating. Expecting her parents to summon a physician, she instead faces their cold indifference—ultimately, she is left in the northern borderlands, the area shared with the so-called barbarians, deemed "vulgar." "I heard barbarians even eat people…" When a massive, rugged barbarian with bronzed skin and numerous scars appears before the frightened Seria, he questions her presence. "What’s a highborn lady doing in a place like this? Reeking of milk like that… Are you waiting for a man to ravish you?" Thus, Seria attracts the attention of the barbarian man, and an unwelcome journey alongside him commences… What fate awaits Seria?