Grey Matter Explosion Girl

"Welcome, to the Human Zoo" When an ordinary high school student Ichii Hana woke up, she was in a cage with her classmates. And there she was entered into a death game involving use of her mobile phone!! Along with a classmate with the same name, yet complete opposite in personality, Inusawa Hana, she challenges the game!? "I'll definitely stay alive. By throwing away this stale body"