Hayate the Combat Butler (Hayate the Combat Butler #15)

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.

While cleaning house, Hayate and Maria stumble upon a heretofore unmentioned, enormous jungle-themed sauna, and promptly get lost in it. After that hot, steamy adventure - complete with misplaced articles of maid clothing - it's time to cool down, as Nagi tries to cure her insomnia with a dip in the mansion's equally massive pool. Too bad she can't swim!