I Entered the Apocalyptic Game

Mu Ran is a gaming black hole. She has played many games, but none of them really made her get into it, until she entered a game where she would die if she didn't take it seriously. But as she played around, she discovered that she seemed to be a bug? Does the game encourage her to kill monsters and sell goods? (System: Haha, just be happy.) Does the game encourage her to cheat her teammates? (System: Haha, everything is fine.) The game also encourages her to become a collector? (System: Okay, I can't help it if you say that.) All in all, this is a game without rules.