Arifureta: The Girl Who Wants To Go Home

When her class and herself was transported into another world by a magic circle in the middle of recess, Rin was terrified. Her friend, Hajime, tried to reassure her that they would be alright, but that was before he fell into the Labyrinth of Orcus. However, his fall changed something in her. Something sinister that she nor anyone never expected from a girl like Rin Hijishuo. Something that make her train so hard and fall into research so far that somehow she found the secret of this world and unlocked her hidden class. Now, with Hajime back, she and everyone else try to find a way back to their world, even if it mean her sanity and innocence gone. -- basically, I'm giving you guys a freebie by giving this summary. good luck if you got hooked, because I'm not a responsible author ;P