Hayate the Combat Butler

Hayate the Combat Butler is a manga series that received an anime adaptation which ran for four seasons from 2007 to 2013.

The story follows Hayate Ayasaki, an unlucky 16-year-old boy who has worked since childhood to make ends meet due to his parents' irresponsible behavior. On Christmas Eve, he finds out that his parents have abandoned him and tried to sell him to the Yakuza to settle their massive 156,804,000 yen debt. While on the run, Hayate meets Nagi Sanzenin, the sole heir of the wealthy Sanzenin estate. At first, Hayate plans to kidnap Nagi use the ransom to pay off the debt, but due to misunderstandings, Nagi thinks that Hayate is confessing his love for her, and hires him as her butler after he rescues him from actual kidnappers.

Episode 1
The Yakuza threaten to take away Hayate's organs, and Hayate's shirt flies up.

Episode 2
Hayate takes a bath.