Gentou is Haruka's and Mika's father. His last name is adopted from his wife's family. His speech and conduct makes him seem like a member of the yakuza, though he is a loving parent who dotes on his daughters. He even bought an entire island for Haruka's birthday. He is against Haruka hanging around Yuuto so much, though he does not mind having Yuuto around when he is alone. He heads the family's private paramilitary strike force unit known as the Hell Hounds.  

(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)

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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)

Gentou Nogizaka