(A/N: No, the AU i chose is not literally called Mystery AU. -_-   - K.)

(God of Hyper Life created a chat with Asriel, Flowey, and Flow.)

Asriel: Who are you?

Flowey: Who are you idiots?

God of Hyper Life: I am the God of Hyper Life. :/

Flow: You can call me Flow.

Flowey: Okay, GHL and Flow, why are you here?

God of Hyper Life: Don't you understand? We wanted to see what the classic versions of ourselves were like.

Asriel: Okay... then who are you a different version of.

Flowey: I think it's obvious for both.

Asriel: How?

Flowey: ... God of Hyper Death... God of Hyper Life...

Asriel: Oh. So... you got Flow.

Flowey: *sigh* Great... I get an idiot. What AU are you from?

God of Hyper Life: What AU do you think, weed?

Flowey: HOW AM I WEED?

God of Hyper Life: You are. I know you are... and he is a crybaby. How pathetic! That's so stupid.

Flowey: ... I like you.

God of Hyper Life: ... It doesn't matter, idiot.

Asriel: So... Flow... what are you like?

Flow: Nice, kind... and thing good that Classic Flowey isn't.

Asriel: ... Then why am I mean in this AU?

Flow: Everyone in our AU is mean, except for me.

Asriel: So... instead of everyone being nice, except for you... it's the opposite.

Flow: Yes.

Asriel: Underfell?

God of Hyper Life: Yes, you idiot. We're from Underfell.

Asriel: Explains why you're so mean... and why Flow seems so nice...

Flow: Yep! Well... I have to go! Toriel is coming back and if she sees me, I'm dead.

(Flow has left the chat.)

Flowey: And what are you going to, Fell!Asriel? You gonna keep being dead?

God of Hyper Life: ... Wait for Frisk to run a genocide route. So... yes. I will kill being dead until then. :/

Asriel: Heh. I wait for True Pacifist.

God of Hyper Life: F*** you, Classic Asriel. F***. You. I'm telling Storyshift!Asriel and Swap!Asriel about you... and Swap!Flowey.

(God of Hyper Life has left the chat.)

Asriel: ... Storyshift? Swap?

Flowey: Storyshift and Underswap. Basically, he's telling Papyrus and Monster Kid... and Temmie. *shivers*

Asriel: You are replaced... by TEMMIE... in Underswap?

Flowey: Yes.

Asriel: XD Wait till the others hear this!

Flowey: Yeah, well... you are replaced by monster kid!

Asriel: That doesn't even make sense...

Flowey: I know. It doesn't. But... whatever. Bye.

Asriel: Bye.

(Flowey has left the chat.)

(Asriel has left the chat.)