Hayate the Combat Butler, Vol. 47

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.
Having braved snowbound mountains and untamed jungles, Hayate, Nagi, and their surviving classmates enter the wildest arena yet: Las Vegas! There, they face tests of luck and money, the two things Hayate never has. Elsewhere, the quest for the Royal Power heats up, even though no one involved seems 100 percent clear on what it is except maybe Athena? Athena usually knows the score.