MC is a loser who had some tragic event happen in his past that lead him to be the boy he is today, while doing something on his phone he somehow gets s**ked into a VR game that some super company that can put mind absorbing VR games onto iphones made. The game involves 100 players trying to kill the princess to win a massive amount of money.

Somehow the MC swaps places with the princess, and must endeavor to keep her alive as unlike other players, he will die if he loses because 'anime reasons'. He didn't appear to choose to play the game, he just sort of gets s**ked in via 'anime magic' and the people inside the game act like children without supervision (rapists, thieves, degenerates and so on). You have a bunch of skills in the form of cards that the players can use and they don't seem to be remotely balanced, plus the MC has absolutely no idea about the rules and 'anime plot' forces him along to whatever end it desires.