Good Luck! Ninomiya-kun

Shungo Ninomiya, a high school guy, lives in a large house with his older sister Ryōko, who works as a mercenary. One day, Ryōko sends the siblings Mayu and Mikihiro Tsukimura to live with them. Mayu's goal is to overcome her fear of men and to control her powers, however, she is a young succubus, a creature that naturally attracts men. Ryōko and Mikihiro have Mayu and Shungo share everything from the same room to the same bed. Making things more awkward, Shungo's jealous childhood friend, student council president Reika Hōjō, joins the household as a maid.

Shungo Ninomiya (二ノ宮 峻護, Ninomiya Shungo)

Voiced by: Junji Majima, Ayahi Takagaki (young), Takuma Terashima (first radio drama)

Shungo, the title character, is a high school guy who trains in martial arts.[2] He often shows self-restraint from his female schoolmates, who enjoy flirting with and teasing him. He and Reika are childhood friends, but he is put in a situation where he must host and live together with Mayu.[3]

Mayu Tsukimura (月村 真由, Tsukimura Mayu)

Voiced by: Mai Kadowaki, Umeka Shouji (young), Yuko Goto (first radio drama)

Mayu is a succubus who is sent to live with Shungo to practice getting over her fear of men. Because she cannot control her powers, she naturally attracts men as if they were zombies, and knocks them out with her power when they get too close. Her clumsiness and ditzy personality often get her in embarrassing situations such as spraying herself with water while wearing a tight white shirt or frequently falling on top of Shungo.[3][4] However, she is sometimes lucky in getting out of dangerous situations, as demonstrated in the remote island storyline.[5] She wears bat-wing hair clips. It is later revealed that she, Reika, and Shungo have known each other as childhood friends.[6]

Reika Houjou (北条 麗華, Hōjō Reika)

Voiced by: Miyuki Sawashiro, Yuki Matsuoka (first radio drama)

Reika is the student council president at Shungo's school, and an heiress to a large conglomerate called the Houjou Group.[2] She acts proud and haughty,[2] and bothers Shungo regularly. However, after being filmed in an embarrassing video where she fails to seduce Shungo, she agrees to become Shungo's maid and lives with him.[4] It is later revealed that she is a succubus who harbors a dark and serious alternate personality that occasionally manifests, as well as a past childhood relationship with Shungo.[2][7] In the anime, she is involved in many of the Houjou Group's businesses including influencing national policies, meeting with dignitaries,[8] and creating corporate products.[9] In the anime, her alternate personality tries to take Shungo for herself.[10]

Ryoko Ninomiya (二ノ宮 涼子, Ninomiya Ryōko)

Voiced by: Michiko Neya, Naomi Shindou (first radio drama)

Shungo's older sister works as a mercenary.[3] In the anime, she joins the school staff as a nurse.[4][8] She carries a camcorder and director's megaphone where she films and directs Mayu in roleplaying situations where she has to romantically interact with Shungo.[4]

Mikihiro Tsukimura (月村 美樹彦, Tsukimura Mikihiro)

Voiced by: Ken Narita, Daisuke Hirakawa (first radio drama)

Mikihiro is Mayu's older brother. He is an incubus, the male counterpart of a succubus.[3] He enjoys manipulating Reika and others to do what he wants. He and Ryōko are long-time friends, as they are often seen working together,[5] even in flashbacks. In the anime episode where Shungo searches for ramen ingredients, Mikihiro happens to own the related businesses: a wheat farm, an animal ranch, and a fishing boat.[9]

Mitsuru Hosaka (保坂 光流, Hosaka Mitsuru)

Voiced by: Kouki Miyata, Yuka Inokuchi (first radio drama)

Mitsuru is a senior student to Shungo, and Reika's main assistant both at school and at home.[4] He has martial arts abilities that rival Shungo's.[1][5]

Shinobu Kirishima (霧島 しのぶ, Kirishima Shinobu)

Voiced by: Saeko Chiba

Kirishima is the head maid for Reika's family. She carries a wakizashi sword, ready to execute Shungo, whom she thinks is not worthy of Reika. She uses Japanese honorifics towards Reika, but quickly reverts to blunt speech towards Shungo. In the anime, she joins the cast after the gang spend a vacation on a private island.[5]

Hinako Ayakawa

Hinako is Shungo's classmate with the short hair. She likes to tease Shungo, and later befriends Mayu.[11]

Irori Okushiro

Shungo's classmate with the long green hair and glasses. She flirts with Shungo, and is later revealed to be a succubus when she kisses him and drains his energy during the class field trip. However, she later reveals it was a ploy to win the affections of a jealous Tasuku, whom she really loves.[6]

Tasuku Okushiro

Shungo's schoolmate with short green hair. He tries to interfere in Shungo and Mayu's relationship in order to get revenge from a fight many years ago, and is jealous because Irori kissed Shungo.[6]

Stig Høgset of THEM Anime Reviews was critical of the anime series stating, "Basically, if you're passing by this show looking for some good, saucy fun, then keep looking. There's nothing to see here."[2]

• Goshūshō-sama Ninomiya-kun at Fujimi Shobo (in Japanese)
• Good Luck! Ninomiya-kun (anime) at Anime News Network's encyclopedia