Bokura no Sentaku

Try Brain is a mysterious new team-based survival game in which players compete as humans, vampires, or zombies in a battle royale. Though Ryouta Shiba is not normally one for video games, he joins after his best friend Kazuki Souma convinces him that they should play together. After selecting his species, Shiba loses consciousness and awakens in an unfamiliar world, where it appears that the existence of blood-drinking and flesh-eating creatures is no longer mere make-believe.

Questioning this altered reality soon becomes less of a priority compared to escaping with his life. As Shiba seeks to reunite with Souma, various events give him reason to doubt whether he chose the right side in this fight. Faced with his natural enemies at every turn, it seems Shiba may have set himself up to die.