(Sans' P.O.V.)

I turned around and started to walk to Waterfall. I got to the echo flowers and poked one just to hear what it would say.

"Sans... I'm sorry."

It had the voice of a child... what?

I poked another.

"I think you don't remember me."

I poked all the others.

"... but I remember you."

"My name is Asriel. Yeah, I know..."

"I'm supposed to be dead... right?"

"You want to know a secret?"

"Right now, you know me as Flowey."

"... but I bet you were asking Alphys about 'Flowey' earlier, weren't you?"

"Yeah, I know you were. I'm not surprised."

"You seem to know everything that's going on anyway, so..."

"It doesn't matter... I'm Flowey now, not Asriel."

"You can't get me a soul, even if you tried..."

"The only chance I have right now is Frisk..."

"I think they might be willing to, but... they'll have to reset..."

"They're almost to Asgore, now... I have to go. They did neutral."

"Maybe, if they're nice enough, you'll get your happy ending..."

"But I will have to stay down here... I don't want them to know."

"Goodbye, Sans. I'll talk to you later."

I smiled and continued to walk, until I realized something... 

They're close to Asgore...

Oh no...

I took a short cut to the last corridor...