You are young Asgore. You, Rudolph, Carol, and Toriel are sitting in class when Toriel begins mocking Carol

Toriel: well, well, well. If it isn't the school failure. You finally crawled out of whatever dumpster you were in and graced us all with your presence.

Carol sinks further into her desk trying not to make eye contact

Carol: Stop it...

Toriel: why should I? You're just an ugly loser, you'll probably end up as a bitter single loser with a crappy job.

You finally have enough and go up and kiss Carol