Trapped inside a game like SAO, Shin finally manages to kill the last boss and free everyone from the game. He made sure everyone left the game before logging out, but before he could, white light swarmed his vision. When he woke up, the log out button was gone and realized that the game he knew has became for real now.
Dude is in an adventuring guild, his guild don't see his potential so they throw him out as bait when things get tough.
He has a skill which enables him to lend out skills to his comrades. Before he was thrown into the lion's den, he made all of them return back the skills he lent them.
The New Gate