We Were Supposed to Raid Tombs, So How Did This Turn Into a Challenge Game?

OOC warning + impossibly handsome protagonist + male-male romance + System Zhang Gutang woke up and found himself in the world of The Lost Tomb. No lightning strike, no car crash, no System notification sound. Oh, wait. There was a System after all. [Ding! Challenge Game System successfully bound.] [Main quest: Join Wu Xie’s expedition to the Seven-Star Lu Palace.] [Failure penalty: Forced elimination.] Fine. I’d transmigrated, and there was a System. So what? He hadn’t had much to tie him down in his previous life. Getting to meet his idol in The Lost Tomb sounded pretty great. But the problem was... Why was he an undocumented person with no ID? Why was he the same generation as Zhang Qiling, yet had to share a thirty-hour bus ride with him? Why did Wu Xie blush and get flustered whenever he teased him? Why was the bottle of emotionless oil’s affection level going up more slowly than his salary? Zhang Gutang looked twenty-five but was actually over a hundred, one of the last long-lived members of the Zhang family. He came with grave-robbing fingers, Qilin blood, and a face so handsome he had no friends. He thought he was here to rob tombs. Then the System told him this was a challenge game. The Seven-Star Coffin, the Blue-Eyed Fox Corpse, the Nine-Headed Snake Cypress, the Forbidden Granny, the Sea Monkeys: every level was a test of life and death. But he wasn’t afraid. He’d read the original. “Damn, I know this plot like the back of my hand.”