Since the tender age of nine, Hayate Ayasaki has busted his behind at various part-time jobs to support his degenerate gambler parents. And how do they repay their son's selfless generosity? By selling his organs to the yakuza to cover their debts! But fate throws Hayate a bone...sort of. Now the butler of a wealthy young lady, Hayate can finally pay back his debts, and it'll only take him 40 years to do it.

Hardworking Hayate has a plan to pay back the yakuza--who are now the legal owners of his body parts: he'll kidnap someone and ransom them for a mountain of money! But things get tricky when his would-be kidnappee--who as luck would have it is the daughter of a mind-bogglingly wealthy family--mistakes Hayate's actions for a confession of love, and subsequently hires him to be her personal servant. At least his employment future is secure, or so he thinks...