Brynhildr in the Darkness

極黒のブリュンヒルデ

Ryōta Murakami has spent years haunted by the death of Kuroneko, a childhood friend who insisted aliens were real and died trying to prove it. When a transfer student named Neko Kuroha enters his class — identical to Kuroneko in appearance but claiming no memory of him — Ryōta is drawn into her secret: she is a fugitive 'witch,' an escaped test subject with supernatural powers, hunted by a research lab that will kill to recover her.