Hai to Gensou no Grimgar

When Haruhito awakens, he's in the dark. He doesn't know where he is, why is he here, and where he came from. Around him there are several men and women who have the same circumstances. Haruhito and his companions find themselves in a "game-like world" called Grimgar and must form a party, cooperate, and learn new skills to survive the harsh environment together.