National Dungeons: I Became the Strongest by Following People Around

[Gaming + Infinite Flow + Lighthearted Comedy] Other people transmigrate and become protagonists, so why does my System make me become an NPC? And why are you calling it stalking?! After transmigrating into a world where games reign supreme, I wanted to become the protagonist and live an exciting, spectacular life. But my System forced me to become an NPC! I was going to abandon the System with righteous resolve and grow stronger on my own, but then I discovered a bug and realized it was actually pretty great. Ever since, the game instances have been anything but peaceful. In an instance: “What the hell is with this NPC? Why did one hit kill me? Is this instance bugged for difficulty?!｀Д´|” “Wait, why does this NPC look so familiar? Wasn't he in the last world?” On the forum: “Hey, everyone, I discovered a shocking secret. I've seen the same NPC in several completely unrelated game worlds. I suspect there's some hidden storyline involving him!” “Does anyone know what the System means by a special player? I think some sneaky bastard has got their eye on me. My back is tingling (≡Д≡；)” Ye Buxie cheerfully watched the players asking for help on the forum, then slit their throats with a single stroke. “My name is Ye Buxie, but I prefer it when you call me by my player ID, ‘Xieye.’ Got that? The ‘Ye’ is pronounced like the word for ‘grandpa.’”