Watch Hayate the Combat Butler!! Online

Taking place one month after the events that occurred in the movie Heaven is a Place on Earth. Living at the Sanzenin Mansion once again, Nagi returns to her old ways of life, until she receives word from American authorities informing her that she has a week to pick up her late father's belongings that was indefinitely delayed due to various circumstances. After receiving news of her father whom she doesn't remember, Nagi then meets a mysterious girl (with a hidden agenda) claiming to be Nagi's little sister. The series tells a new story that is original to the anime and not directly based on the manga. The main author of the original series Kenjiro Hata personally created the original concept for the story of this anime. (Source: Hayate no Gotoku! Wikia)

To encourage Nagi to swim and enjoy summer, Maria invites various friends to their Sanzenin family's private beach. While everyone is having fun, Nagi hesitates to wear swimsuits and come out because of her small breasts, and refuses to join...

Hayate Ayasaki's misfortune continues to hand him the short end of the stick. Now settled into his routine at the Sanzenins' mansion and Hakuou Academy, the butler continues to work as hard as ever in caring for his young mistress Nagi while studying the school's grueling curriculum—all on top of trying his best to survive the multitude of troubles that life relentlessly pushes onto him. The unintentional chick magnet's life is far from quiet, forced to deal not only with Nagi's yet unnoticed infatuation with him, but also the evergrowing string of accidentally seduced girls—most notably, the exceptionally plain Ayumu Nishizawa, a friend of his before he became a butler, and the diligent Hinagiku Katsura, Hakuou's student council president. While one struggles to gain his affection and the other desperately tries to deny her own, both the girls are going to make the boy's life a little more complicated than it already is. [Written by MAL Rewrite]

Hayate, Nagi and the gang spend the last days of summer break at Nishizawa's countryside vacation home. But a mysterious spirit has concocted a scheme to separate the butler from his young mistress. (Source: ANN)

Taking place after the events that occurred in Hayate no Gotoku! Can't Take My Eyes off You. Hayate, Nagi and Maria return to their daily lives at the Sanzenin Mansion and the Violet Mansion. (Source: Hayate no Gotoku! Wikia)