Gokukoku no Brynhildr Temporada 1 Episódio 1

Murakami Ryotas best friend, Kuroneko, died in an accident trying to prove aliens existed when they were kids. Now, a girl who looks just like her transfers into his high school. When confronted Kuroha Neko insists she isnt Kuroneko, but she ends up revealing something else even more surprising...