After these trivial things were handled, it was already late at night. Allen Peterson sat on the sofa and fell asleep with his back.

Just as Ava Smith was about to greet Allen Peterson home, her mobile phone suddenly rang.

"Hey! What's up? OK, send the file to my computer!"

What just happened disrupted her plan to go home and rest. She fell on her desk and continued to work.

The next morning, the first ray of sunshine shone into the house along the French window. Allen Peterson opened his eyes. Is it the next day? When did he fall asleep?

"Ava Smith, haven't you slept yet?"

Looking at the...