Engaged to the Unidentified

Plot

Kobeni Yonomori is a high school girl who lives with her mother and older sister Benio. Upon turning sixteen, Kobeni is shocked to learn that, due to an arrangement by her late grandfather, she is engaged to a boy named Hakuya Mitsumine who, along with his little sister Mashiro, come to live with Kobeni. As Kobeni spends time adjusting to this new family, she learns there is more to Hakuya and Mashiro than meets the eye. Soon, Kobeni's life becomes a bit more interesting between having a fiancé, a new sister-in-law, and a crazy sister.

Yonomori Household

Kobeni Yonomori (夜ノ森 小紅, Yonomori Kobeni)

Voiced by: Haruka Terui The main heroine, a responsible sixteen-year-old who handles cooking and chores well. When she was younger, she fell down a cliff but was saved by Hakuya. The incident left her with a scar and little memory of the event, as she doesn't remember Hakuya when they meet again. Over time she recalls more of her memories of the incident, later learning she had received half of Hakuya's inhuman power, the side effect of which gives her fever on occasion. In school she is noted for her cute face, large bust and (as Mashiro puts it) "child-bearing hips" (which she is conscious of). She is also very conscious of the unwanted attention she receives for being the student council president's younger sister. She begins to seriously date Hakuya later on in the series and go on formal dates out. Although she is very nervous any time they do.

{{Nihongo|Benio Yonomori|夜ノ森 紅緒|Yonomori Benio}

Voiced by: Eriko Matsui Kobeni's older sister, who is the student council president at her school. She is both a siscon and a lolicon, and is incredibly doting on both Kobeni, who has gotten used to it, and Mashiro, who fears her greatly. She is quite popular at school, often putting on a more refined personality than at home. In school, she is called Benio-sama. She is protective of Kobeni as she feels somewhat responsible for what happened.

Akane Yonomori (夜ノ森 茜, Yonomori Akane)

Voiced by: Yui Watanabe Kobeni and Benio's mother, who is often busy working.

Mitsumine Household

Hakuya Mitsumine (三峰 白夜, Mitsumine Hakuya)

Voiced by: Wataru Hatano Kobeni's arranged fiancé and Mashiro's older brother. A quiet but kind-hearted boy who silently helps out Kobeni when he can, though is sometimes slow to catch onto things, and does not bother at all with their arranged marriage, as he truly likes her. When they were younger he saved Kobeni's life after she fell down a cliff and blames himself for failing to prevent it. He injured his right eye in the accident, causing him to lose part of his vision. As a result, he grows his bangs long to cover up the scar. He has a hobby of constructing models of historical buildings from matchsticks, which are often ruined by Mashiro. It is later revealed that he is an Inugami, who gave half of his power to Kobeni to save her life. His usually expressionless face makes him a person hard to read, even to his family. Kobeni, however, seems to be an exception. He begins to seriously date Kobeni later on in the series and go on formal dates out.

Mashiro Mitsumine (三峰 真白, Mitsumine Mashiro)

Voiced by: Yuri Yoshida Hakuya's younger sister, who was able to enroll in Kobeni's class despite being nine years old by using a hypnosis-like power to fit into the crowd. She often complains that she isn't a child despite being no older than ten, but her true feelings regarding her likes and dislikes can be easily read by the others. She is quite fearful of Benio but is easily swayed by sweet things. She also has a fear of aliens and UMAs but becomes intrigued by the latter when she discovers toy models of them inside some chocolates.

Shirayuki Mitsumine (三峰 白雪, Mitsumine Shirayuki)

Voiced by: Yuri Komagata Mashiro and Hakuya's mother, who is petite and looks young for her age. She is easily distracted by sweet things and tends to blurt out important information casually. She is the one who casually lets slip that the Mitsumine clan isn't human.

Other Characters

Mayura Momouchi (桃内 まゆら, Momouchi Mayura)

Voiced by: Aimi Terakawa Kobeni's classmate and best friend, whose family runs a big chocolate factory.

Nadeshiko Kashima (鹿島 撫子, Kashima Nadeshiko)

Voiced by: Ayane Sakura The student council vice-president, who often has to keep Benio's urges in check.

Konoha Suetsugi (末続 このは, Suetsugi Konoha)

Voiced by: Saki Fujita The student council's secretary, she greatly admires and is fond of Benio just like everyone else at school (with a few exceptions: Mashiro, etc.) and is jealous towards Kobeni and Mashiro because they both live with her. She comes from the same species as Mashiro and Hakuya and seems keen on getting Hakuya to marry her because her mother told her to not miss the chance of claiming a male of their species due to their rarity.

Niko Ōno (大野 仁子, Ōno Niko)

Voiced by: Asuka Kakumoto Konoha's close friend and a member of the school's newspaper club, who is always on the lookout for a scoop to get herself promoted to the position of editor-in-chief.

Manga

Mikakunin de Shinkōkei began as a four-panel manga series made by Cherry-Arai and published by Ichijinsha. The first chapter was released on April 22, 2009, in the Manga 4-Koma Palette (at the time Manga 4-Koma Kings Palette) magazine's June 2009 issue. The series has been collected in seven tankōbon volumes since July 22, 2010, the latest of which was published on March 20, 2015. The fourth volume was released simultaneously with a limited edition on December 28, 2013. Bundled with it was a DVD with an animated music clip of the song Zentaiteki ni Sensation (ぜんたい的にセンセーション) performed by Haruka Terui, Eriko Matsui and Yuri Yoshida. An original video animation was released with the limited edition of the fifth volume.

Anime

An anime television series aired in Japan on ABC channel between January 8, 2014 and March 26, 2014. The series is directed by Yoshiyuki Fujiwara at studio Dogakobo with script by Fumihiko Shimo and character design by Ai Kikuchi, who is also the chief animation director. Besides ABC, the anime also aired on AT-X, Tokyo MX and BS11 and was simulcast with English subtitles by Crunchyroll and through select digital outlets by Sentai Filmworks. The series will be released in Japan in 6 DVD and Blu-ray Disc volumes between March 19 and August 20, 2014. The first volume contains a 12-minute-long original video animation episode. A 10-minute-long OVA episode was released on March 28, 2014, bundled with the limited edition of the fifth tankōbon volume of the manga.

Episode list

OVAs