Brynhildr in the Darkness

Brynhildr in the Darkness is a science fiction Japanese manga series by Lynn Okamoto that began serialization in Shueisha's seinen manga magazine Weekly Young Jump in January 2012. A television anime adaptation by Arms started airing on April 6, 2014.
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Genres: Mystery, Drama, Fantasy, Sci-Fi, Seinen

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Plot
The original manga revolves around high school boy Ryōta Murakami, who cannot forget his female childhood friend whom he let die in an accident. Feeling that he must fulfill their promise of proving the existence of aliens, he has continuously looked up at the sky as a member of the astronomy club. One day, a girl named Neko Kuroha who looks exactly like his childhood friend appears as a transfer student. It turns out that she is a magic-user that has run away from a research lab.

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