Here is a less formal introduction:

I traveled through time and seemed to be an employee of a company.

Wow, that's a lot of salary!

The alarm sounded.

Asking me to suppress the minions? What the hell is this company?!

The following is a serious introduction:

I am Ye Lan. The best employee of Lobotomy Corporation in X0XX. Miss Hod doesn't even need to do core suppression after seeing me.

But no one in the company knew that I was actually a spy from a company in a world even outside the ruins. (Of course, Miss Angela might know this, but she didn't tell anyone, so no one knew.)

But besides this secret, I have another one.

A secret that even my real company doesn't know: I'm a time traveler. (But maybe I've told Miss Angela about this in one of my previous loops.)

"Tell me, when faced with an opportunity to rise to the top in one step, can those who consider themselves noble still uphold their principles?" Having accomplished the feat of conquering the world, Caesar, feeling no joy, decided to embark on a mad game. "Really? I can get ten thousand gold just by killing my wife?" "Isn't it just indulging in lust with that dragon? Watch me!" "Summon... what is a plague? Summon one!" Add a little desire, add two spoonfuls of reward, sow the seeds of madness, and reap the fruits of chaos. As the world crumbled, Caesar finally kissed the lips of pleasure. Those who still retained their reason resolved to rebel, but before that absolutely overwhelming emperor, they clearly needed a savior! ...Lancelot: "You mean, my enemy is someone with super strength..."