Akiho is Haruka's and Mika's mother. Despite having given birth twice, she appears youthful and beautiful; Yuuto originally thought she was Haruka's older sister or cousin when he first met her. She is a principal of a cooking school. She has a quiet and intellectual demeanor but has the strength to overcome her husband; in fact, she is referred to by Yuuto and Haruka as "Nogizaka house's ultimate weapon". In contrast to her husband, she thinks it is good that Haruka and Yuuto spend time together, and she likes to watch the development of their relationship. However, she is very strict that Haruka keeps up her studies.  

(From: Wikipedia)

The story centers around Yuuto Ayase and his classmate Haruka Nogizaka. While Yuuto is rather ordinary, Haruka is very attractive, intelligent and rich. Due to this, she is the school's most unattainable girl and is so idolized that her classmates give her the French nicknames "Nuit &Eacute;toile" (The Silver Star of the Night) and "Lumi&egrave;re du Clavier" (The Shining Princess on the Piano). One day, when Yuuto goes to the school library to return a book, he stumbles across Haruka and her darkest secret&mdash;she is a diehard fan of anime, manga and the otaku culture. Yuuto promises to keep her secret hidden and the two become close friends. Yuuto does his best to help Haruka with her secret hobby while developing his relationship with her. 
(Source: Wikipedia)

Haruka's manga and anime hobby is still concealed by her dear friend Yuuto, but Yuuto's other female friend starts to feel affection and attraction towards him, so a feelings war begins among their circle of friends. Meanwhile Yuuto tries to make Haruka happy doing what she likes the most: drawing manga, watching anime, and attending special anime events.
 
(Source: Anime News Network)

Yuuto and Haruka are looking forward to spending time together on a school trip. However, Shina finally works up the nerve to tell Yuuto she has feelings for him. This event drives a wedge between Haruka and Yuuto and forces them to confront how they feel.
 
(Source: Anime News Network)

The main character, Ayase Yuuto is your average boy without any special traits. He attends a private high school where he is one of the many and doesn't stand out, until, one day, he happens to discover the secret of the school princess Nogizaka Haruka, and his life changes drastically from there on. 
Haruka, the school's most unattainable girl, is so idolized in the school for both, her looks and intelligence, that her classmates nickname her Nuit &Eacute;toile (The Silver Star of the Night) and Lumi&egrave;re du Clavier (The Shining Princess on the Piano). However, nobody knows that it is only a fake role she assumes to hide her true nature. In reality she is a die-hard fan of anime, manga, and otaku culture.

Akiho Nogizaka