I can do anything if I work hard

Daiki with his whole class got transferred to a game like real dungeon where they had to complete the game to return. The survivors will get one wish fulfilled while the MVP of the game gets two. He got the mysterious and weakest class 'Work Hard (?)' and the lowest stats among his friends in a game like real life dungeon. As he requests the system to seperate him from others for 6 months where he starts practicing alone to become stronger than his friends and prove to everyone that he could become strongest against any odds and to stop them from wishing something dangerous.