Muse

The ultimate… Shonen? Shoujo? I don’t know, it’s one of those. Size-based power levels, weekly steamy battles, ludicrous amounts of tail touching, cute girls being moe… you won’t want to read any other series*. *Chances of actual production currently extremely low.

Tsukino

A poor unfortunate fox. Flat chested, thin as a twig, and sporting only one tail, it’s no wonder she figured she was simply another victim of the Spontaneous Attribute Theft crisis plaguing the land. Her life changes when she discovers she’s truly the heir of the size goddesses who had her powers stolen by a nefarious villain who wishes to steal all of mankind’s size. She sets off to reclaim her power and restore peace to the world, joined by... characters I haven't come up with yet...

She's a sweetheart who only fights when it's absolutely necessary and selflessly seeks to help others, practically needing to be forced to accept rewards for her acts of kindness.

Her tail is really sensitive...

Bust size: Starts off an A cup, fluctuates between various impossibly massive sizes through absorption and compression, eventually becomes infinite.

Height: 5 feet 5 inches

Likes: Fried tofu, tail fluffing, ear petting, origami (her mother taught her)

Dislikes: Grief caused by a lack of size, bugs, bitterness

Maomao

A mischievous catgirl whose greatest desire is to be the biggest in the world. She declares Tsukino her archenemy after their initial encounter leaves her completely drained of all her hard earned size. She’s easily set off by Tsukino’s insistence that she’s a size goddess, interpreting it as the fox being outrageously full of herself. She also can’t stand her cute face, lovable personality, and that great big hunk of fluff that she can’t help but sink her hands into every time she sees it…

They keep running into each other due to their attraction to size-related incidents. She definitely has more perverted intentions than Tsukino though. She even helps her on multiple occasions, and it’s totally not because she’s caught feelings for the fox or anything..!

Bust size: ZZ cup, then becomes an A cup after her first battle with Tsukino, eventually gaining a catastrophic amount of boob.

Height: 5 feet 8 inches

Likes: Boobs, fluffy tails, fish, superiority complexes, mahjong (note: I have no idea how to play mahjong.)

[Chifusa making a valiant last stand against the endless tides of breasts from all corners of fiction intruding on her reality, only to realize that stealing any portion of infinity is still stealing infinity...]

In a spontaneous twist of fate, every single pair of breasts in all of fiction had suddenly become infinite... except for those in Chifusa's world, for whatever cruel reason.

Billowing titflesh surrounded her from all sides, threatening to wholly replace her existence to make way for even more titflesh. She wouldn't have it, her life's end would not be reached in such a humiliating manner.

With a cry of desperation, she unsheathes her blade and slashes at the soft, pillowy walls attempting to entomb her. Their encroachment suddenly ceases, but this only allows new pairs of breasts to squeeze through and attempt to smother her. The battle seemed endless, but eventually does she manage to subdue the army of titties. Exhausted, she takes a moment to finally rest...

...before noticing that familiar tingle in her chest.

"W-Wait, there must've been thousands of them?! Just how big are they going to ge–"

[Kirika but her tits are so big they break into other stories and override their writing with "and then Kirika's tits bwoomped into reality and smushed everything"]

The foxboy would draw the sword from his chest, invigorated by the mysterious power now coursing through his body. Feeling his strength returning, he rose to face the terrible demon which craved his flesh and blood...

...and then Kirika's tits bwoomped into reality and smushed everything.

There wasn't a single atom left in the entire universe that wasn't her apocalyptic chest, accidentally released upon existence when she attempted to adjust the last article of clothing that would still fit it—the Last Resort omni-infinicompression bikini.

"As if anything less was to be expected of my prodigiou

[And then Kirika's tits bwoomped recursively into her own narrative,

[Kirika but her tits are so big they break into other stories and override their writing with "and then Kirika's tits bwoomped into reality and smushed everything"]

The foxboy would draw the sword from his chest, invigorated by the mysterious power now coursing through his body. Feeling his strength returning, he rose to face the terrible demon which craved his flesh and blood...

...and then Kirika's tits bwoomped into reality and smushed everything.

There wasn't a single atom left in the entire universe that wasn't her apocalyptic chest, accidentally released upon existence when she attempted to adjust the last article of clothing that would still fit it—the Last Resort omni-infinicompression bikini.