"You bought me, so I’m yours." Due to the sudden death of her parents, Lydia's happy life was shattered. The fallen noble lady was separated from her remaining family — her twin younger siblings — and was left with only a mountain of debt. She longs to live with her siblings again, but she doesn't have nearly enough money. Despite her desperate situation, she cannot ignore the young, amnesiac slave who once helped her being mistreated. So Lydia buys him, names him Leo, and they begin living together. Leo brings Lydia luck and money, growing more beautiful as time passes. He becomes a sword protecting Lydia, hoping for a peaceful life. But when his lost memories return, everything changes... A love comedy about Lydia, a noble lady obsessed with money, and Leo, a guard dog obsessed with Lydia.