The wrong transmigrator assigned by the system

A shut-in who can't find a girlfriend makes a bet with his best friend and starts playing Dark Souls, only to accidentally travel to another world.
"Someone tell me, what the hell is this seed machine gun?!"
"What the heck is 'fine snow' again?!"
"Why is the Sage's Candlestick made of a fire-breathing dragon's tooth!?"
In short, it's the story of a transmigrator who accidentally got assigned to the wrong system and ended up in another world.