Hiroko Matsukata is a woman who works for a magazine company. She puts all she has into her work, and is known as a strong, straight-forward working girl, who can at will turn herself into Hataraki man (working man) mode. Despite Hiroko's success at work, her life lacks romance. Even though a hard worker, she'd leave early anytime to go on a date. Too bad her boyfriend is an even bigger workaholic than Hiroko. (Source: ANN)

Professional wrestler Genzou Shibata sports the body of a mountain, but beneath his hulking appearance is a man with an extreme affection for animals. Facing off his opponents in the ring as the legendary Animal Mask, Genzou wins the hearts of crowds everywhere with his iconic tiger persona. During the bout for the title of World Champion against his greatest rival, the Macadamian Ogre, Genzou is suddenly summoned to a fantasy world by a princess. With her kingdom being threatened by a monster infestation, she pleads the wrestler for assistance—to which he answers by knocking her out with a German suplex! Escaping the castle and finding himself stranded in a mysterious land, Genzou decides to begin his career as a beast hunter to capture and befriend creatures far and wide. Joined by the wolf-girl Shigure, the dragon-girl Hanako, and the vampire Carmilla Vanstein, the professional wrestler pursues all kinds of dangerous requests for the sake of fulfilling his dream as a pet shop owner.

Sometimes, it is the simplest gestures that convey the most intimate feelings. From awkward first encounters in an elevator to receiving a hand-knit sweater, love can blossom even in the most mundane of situations. Each new experience of sweet—and at times bitter—romance develops in less time than it takes to smoke a cigarette.

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)