You were taken to a certain laboratory, where you couldn't get out because you were being taken by Alphys.

When you entered, Alphys handed you over to another person, and then she left, you looked at Alphys and walked away and turned back to see the person in front of you.

"..Hello human.."

You look at the monster from top to bottom, and look into her eyes again, and realize that she was holding some kind of injection, with a somewhat intimidating look and smile