GOSICK takes place in 1924 in a small, made-up European country of Sauville. The story centers on Kazuya Kujo, the third son of a Japanese Imperial soldier, who is a transfer student to St. Marguerite Academy, where urban legends and horror stories are all the rage. There he meets Victorique, a mysterious yet beautiful and brilliant girl who never comes to class and spends her days reading the entire content of the library or solving mysteries that even detectives can't solve.
It's a really good anime I would recommend it to anybody but only people who have strong stomaches because of parts where ... well you know what happens but any ways its really good.
Keita has two older stepsisters, Ako and Riko, but since they aren't related by blood, they love him in a lustful way. After a mishap at school, Ako and Riko finally confess their love to him. Keita dislikes the thought of seeing them other then brother and sister, but as he tries to enter the same school as his sisters, he slowly becomes attracted to them.
Nanami Haruka wants to be a song writer, so she attends an idol training school filled with handsome boys. The school pairs each aspiring songwriter with an aspiring idol, but Haruka finds herself paired with 6 bishounen idols. To make things more difficult, Nanami is also not allowed to date any of her beautiful partners.