After Kanna Kamui's escapade to New York leads her to make a new friend named Chloe, Kanna invites her to Japan to go sightseeing. Following their reunion at the airport, Kanna—accompanied by Kobayashi, Tooru, and other friends—takes Chloe around the attractions of Japan, starting with Akihabara. Expertly guided by Tooru, the group enjoys exploring the city before returning home to meet with Saikawa and continue their adventures. As Chloe's final day in Japan draws near, Kobayashi helps set up a farewell party so everyone can enjoy one last event together before Chloe returns to the United States.

Kobo Tabata lives in a typical Japanese family. His father is a normal salary-man, his mother's a typical housewife, his grandparents (from his mother's side) help to take care of the family and it's pets, and his uncle's a slightly obese high school teacher. Still, they manage to find odd situations that sometimes arise due to Kobo's growing up process or simply because of their own habits and misunderstandings. (Source: ANN)

As Kobayashi sets off for another day at work, she opens her apartment door only to be met by an unusually frightening sight—the head of a dragon, staring at her from across the balcony. The dragon immediately transforms into a cute, busty, and energetic young girl dressed in a maid outfit, introducing herself as Tooru. It turns out that the stoic programmer had come across the dragon the previous night on a drunken excursion to the mountains, and since the mythical beast had nowhere else to go, she had offered the creature a place to stay in her home. Thus, Tooru had arrived to cash in on the offer, ready to repay her savior's kindness by working as her personal maidservant. Though deeply regretful of her words and hesitant to follow through on her promise, a mix of guilt and Tooru's incredible dragon abilities convinces Kobayashi to take the girl in. Despite being extremely efficient at her job, the maid's unorthodox methods of housekeeping often end up horrifying Kobayashi and at times bring more trouble than help. Furthermore, the circumstances behind the dragon's arrival on Earth seem to be much more complicated than at first glance, as Tooru bears some heavy emotions and painful memories. To top it all off, Tooru's presence ends up attracting several other mythical beings to her new home, bringing in a host of eccentric personalities. Although Kobayashi makes her best effort to handle the crazy situation that she has found herself in, nothing has prepared her for this new life with a dragon maid.

Hasukawa Kazuya is in a terrible bind. His brother's new wife is also the woman that Kazuya secretly loves. Determined to avoid them both, Kazuya leaves home to live in the student dorm called Greenwood. There, he hopes to find peace of mind. Unfortunately for Kazuya, stability and peace are the last things one might find at Greenwood - home of the weirdest characters on campus. (Source: ANN)