Nazo no Kanojo X
English name: Mysterious Girlfriend X
Genres: Romance
Type: TV, Episodes: 13
Aired: Apr 8, 2012 to Jul 1, 2012
Studio: Hoods Entertainment
Source: Manga
Rating: R - 17+ (violence & profanity)
Synopsis:
First encounters are always memorable because regardless of the outcome, new experiences are sure to happen. For Akira Tsubaki, a young boy who knows next to nothing about girls, and new transfer student Mikoto Urabe, a mysterious girl who wears a cold facade, their first encounter takes a turn for the romantic.

Through a series of strange events, Tsubaki suddenly falls in love with Urabe, and together they develop a curious bond. Thus begins the romance and mystery of Urabe, a girl who seems to have a unique way of expressing her emotions.