Let's just say...even though it's literally the Anti-Void, the Sanses (including Avil) can access to it without difficulty, with the help of teleportation...stuff, but it's not always a success. Anyways moving on-

AVIL'S AN ADULT AROUND THIS TIME >->

(The words in italic are thoughts of whoever are the words coming from.)

~~~~~~~~~~

(Error, Blue and Avil are staying around the Anti-Void, sitting while chit-chatting about stuff and doing their thing. In the meantime, one of the Darks would pay a short visit, but they won't stay for long. Nightmare is the least likely to visit because of Avil around, but since Blue would also be there, he's not fully unhesitant to visit at least once. But if Nightmare's the least likely to come, who's most likely to come? Well...)

Lust: Hey, Avil ~ and you two as well~

Error: Oh, not this one again...

Blue: Hello again, Mr. Lust!

Avil: Oh hey, Lust.

Lust: It's been a while since we last met each other face-to-face, hasn't it~ *sits near Avil*

Avil: Heh, yeah...

Error: Hey, I'm noticing somethint from the both of you... *gesturing to Avil and Lust*

Avil: Huh? What is it?

Error: You two look like...partners. And I mean partners.

Avil: What do you mean by that? I don't quite get it...

Lust: He means we look like a great couple, dearie~

Avil: H-Huh?? *blushes a bit*

Error: I-I don't mean it ENTIRELY! It's just that - you two look awfully fitting, that's all!

Lust: Aww, is that a compliment of sorts~?

Error: I don't even know if it's a compliment or an insult in the first place...

Blue: Whoa, Miss Avil and Mr. Lust as couples? Wowie, that sounds weirdly fitting!

Avil: B-Blue!! *blushes even more*

Blue: What? I, the Magnificent Blue, is mostly right!

Avil: Yep, that's it! I'm leaving! Goodbye! *stands up*

Lust: Oh, leaving so soon~?

Avil: I shall not let this conversation continue further. I have business to go through, so I shall take my leave! *uses the teleportation device to leave the Anti-Void*

Lust: *sigh* We were just starting to hit the good part...

Blue: What happened to her?

Error: Better not ask, Blue...

At the Stars Headquarters...

Dream: Oh hey, Avil, where have you-

Avil: *passes by Dream, her face almost completely hot pink*

Dream: Um...Avil..? I feel...strong embarrassment from you...and defeat?

Avil: Not now, Dream. I'm going to my room.

Dream: Oh - okay..?

In Avil's room...

Avil: *jumps onto the bed, her whole body facing to the bed's body* This is one of the worst days of my life!!! Ugh, why did Error have to mention about that?! And in front of Lust himself, too! I don't like-like him, alright?!

...

Avil: ...and yet, I feel something...a bit odd...whenever I'm around him..?

Back at the Anti-Void...

Blue: Oh yeah, about what happened just now...hey Mr. Lust, how do you feel whenever you're around Miss Avil?

Lust: Oh, her? Well... *blushes a bit* I think of her a bit more than just someone to tease around to...

Blue: *gasp* Do you have feelings for her??

Lust: I-I mean, not exactly! Well...sort of...

Error: Well, not gonna lie, her blushing looks like she feels something about you...what do you think?

Lust: Well, um...let's just talk another topic, shall we?

Error: Erm...if you say so...

~~~~~~~~~~

"Hints I smell?? Wait, hints don't have a smell...but anyways, this is basically about future Avil and Lust stuff, and I was thinking about this for quite awhile, so...

Just think that Underlust is like Mettatontale but also not Mettatontale at the same time in this multiverse. Still a bit of, *ahem*, NSFW, but not so much...actually, it's still equivilent to usual Underlust - meh >->"