Hayate the Combat Butler

The entire recurring cast from the first TV season is invited to the private beach inside the Sanzenin estate. Just as Nagi is about to join in the fun, a vengeful spirit intent on disrupting their fun appears.

A marathon is coming up at Nagi's school, and Maria and Hayate want her to participate too. Nagi makes a bet with Klaus, where if she can get in first place in one of the races, then that would prove Hayate's worth as a butler, but if she cannot, then Hayate will be fired. Hayate trains with Nagi the next two days, and the day of the race the two get off on a slow start. Before long, Hayate must carry Nagi throughout most of the race, and faces a few enemies along the way impeding their progress. After running into Hinagiku, Nagi goes on ahead, but just as she is about to win, Hinagiku's older sister Yukiji beats her to the goal, winning the 150 million yen prize.

As stipulated, Hayate is to be fired as Nagi's butler, but as Klaus fears getting fired himself for this, he sends Hayate off to be trained at the Tiger's Den for Butlers to show his worth. Hayate meets a Catholic sister on the train, Sister Fortesia, and he later meets her again at a church which doubles as the location of the Tiger's Den. The next day, Hayate must find three others to go on a Butler Quest in an underground dungeon as a part of his training. Nagi is quick to join, and Yukiji and Wataru also join in.

Hayate and his party members continue to go on the butler quest. Hayate is poisoned by a poisonous spear after saving Nagi's life. Meanwhile, Hinagiku and Isumi are on the quest to help Hayate and exorcise this evil spirits, respectively. Hayate's group encounters the now-dead, ghost priest of the church, Rin Regioster, who points out Sister Fortesia to be a fake. The sister is takes control of a plug-in giant size robot to enact her revenge against the Sanzen'in family. While Fortesia and Hinagiku are fighting, Yukiji is possessed by an evil spirit, and attacks the others, also using the giant robot. Hayate exudes more power and destroy the robot, while Isumi exorcises the spirit possessing Yukiji. Back at the mansion, Hayate collapses after the butler quest.

A new semester is about to begin, but Nagi is lazying arround as usual. Hayate and Maria try to cheer her up without success until she gets impressed by a TV Show about aliens near Area 51 in Nevada, USA and wishes to get there to investigate. An opportunity arrives when she recieves a call from the U.S. Police asking her to retrieve some of his late father's belongings, but Maria states that she is forbidden to get there until Silver Week. Nagi flees from the mansion in anger just to find later that she had forgotten her cellphone and wallet and is unable to get back home. However she is found by Hayate and when he is approached by a small child, he finds that Nagi was kidnapped. Hayate gets on the girl's bike to pursue the kidnappers and rescues Nagi from them. Just then Hayate and Nagi return home, the girl appears before them once more, introducing herself as Ruri Tsugumi and claiming to be Nagi's little sister.

Despite her shocking revelation, Ruri is ignored by Hayate and the others until she is finally brought before Nagi who hears from her that she is actually her sister, despite having no proof of it. Nagi allows her stay for a while, but after seeing her snooping around the mansion, she decides to take her to live with the other tenants of the Violet Mansion. Ruri refuses to stay, until Nagi is convinced to give her a chance. Nagi asks Ruri if she has any sort of special skill and she reveals herself as a master of Systema, strong enough to confront Hayate. Hayate is attacked mercilessly by her until he decides to fight back and she starts crying, which is later revealed as just a trick for him to open his guard. Nagi reprimands Ruri for using such underhanded tactics but compliments her for her fighting skill, even asking to learn it from her.

At Hakuo Academy, Ms. Katsura tells Hayate to deliver student council notes to Hinagiku. Hayate finds Hinagiku napping when Miki, Izumi, and Risa appears, waking her up, judging that Hinagiku is often scary. Hinagiku decides to be nicer for Hayate. Despite hearing her favorite tea cup get broken, and her sister already spend the money that she lend to her, Hinagiku shows a smiley personality to them; much to their surprise. Hayate suddenly ask Hinagiku to see a kids’ movie with him then Ruri joins them later. The kids in the theater tease them thinking that they are a couple, the movie starts shortly after but the film cuts off. Then Hayate takes Hinagiku to an amusement park; leaving Ruri behind. They enjoyed themselves until it was time for them to leave. Hinagiku ask Hayate to why did he take her out, he explains it was Miki and the others who told him to; thought she was having a bad day. Hinagiku says that she wouldn’t go out with a guy unless she likes him, but Hayate couldn’t hear that part.

Hayate shops in a poverty district then experience his misfortune. The story goes back in the daily life at the Violet Mansion apartment, where Hayate and Hinagiku make an early morning preparation. Maria notices how Hayate can be so popular with the girls. The tenants; Chiharu, Kayura, and Ayumu leave for school as Nagi gets up late despite Hayate's actions to wake her when she's been trying her best to do better in life. Athena Tennousu (as Alice in child-form) barely stays awake. After school, Nagi attempts to play video games when they all should be studying for their final exam. Hayate continues his hard work preparing for tomorrow already then begins studying after midnight and Hinagiku comes to his room to tutor him, and he wakes up for just an hour of sleep and does the same early morning routine. Unfortunately, he discovers everyone is sick; except Ayumu until she fakes it. The next day, Hayate caught their cold but pretends he's fine to relieve Nagi’s worries.

Nagi is playing her fierce video games until Maria instantly unplugs the TV. One morning, Nagi inadvertently awakens early at the Sanzenin Mansion and discovers how the early mornings can be so delighted. She follows a scent of cooking and found Hayate in the kitchen. After eating breakfast, Nagi tries not to get sleepy by doing some exercise which isn’t easy for someone of her lifestyle. At Wataru Tachibana's video store, Nagi purposely rents an R-18 naked DVD mix with a stack of random ones; however, when she presenting it to Shiranui in her tree house Nagi found out she had grabbed an R-18 horror DVD by mistake. Ending up watching the whole film Nagi becomes terrified and begs Hayate to stay by her side all day until she’d fallen asleep, and Hayate whispers her a good dream that suppress her fears. Maria also watches the film and its déjà vu. Shifting back at the Violet Mansion, Nagi confined herself from going to school on a soggy day.

Having to sleep late again Athena (Alice) takes in some sunlight for refreshments. Hayate gave her some ringlet-shaped chocolate. Suddenly, a big dog approaches Athena then licks her. She demands Hayate to find its owner. While they search for the dog’s owner on the streets, Athena disciplines the dog. Fumi appears declaring the dog, Armageddon, is hers. Armageddon quickly tackles onto Fumi, just as they leave Athena signs she likes Armageddon, and Fumi responds he likes her too because of her ringlet-shaped hair. The next day, Wataru struggles with the pile of money that Sakuya had delivered to him in order to keep his business funded. Hayate and Saki offer to help deposit the money into the bank account regardless of Wataru's denial. Walking on the streets, Armageddon and Yukiji suddenly appear then the dog snatches the briefcase full of money and runs off.