The second level: breast and ass expansion

Fujimaru Ritsuka put his logic before his lust, as he had to do so many times with the bouncing assets of his voluptuous servants tempting him so many times in his adventures through the other singularities. He picked up the pace and ran up the stairs, the formation changing from a circle to 3 in the front (medusa, boudica, and artoria), 3 at the back (mash, nightingale, and raikou), with Fujimaru in the middle.

After running up the long twisting stairway, battering and slicing at any monster which tried to run or jump up to attack them, they lost the beasts as they slowly fell back while the group made it up to the second level, practically jumping through the entryway.

"Phew...those guys were relentless..." Fujimaru Ritsuka nearly doubled over to catch his breath, with his servants looking down the stairway to ensure no monsters had followed them up while the servants in front of him started to look around the room.

"The mana in here is getting thicker, I sense that more powerful enemies will appear the higher we go." Artoria noted in her noble and strong voice fit for a king as she raised her spear and looked around for any threats in the huge open space.

"We'll be ready for any beast that appears!" Boudica confidently shouted as she also looked around, ready for a fight.

"Hopefully they're not naked this time..." Mash nervously hoped as the servants at the stairway entered the space, trying to keep the blush and nervousness from her face, "I could see their cocks!" she blinked quickly as she remembered the obscene sight.

"There, there, Mash. It will be alright." Raikou put her hand on Mash's shoulder, calming her down, "Sometimes I forgot that you and master haven't done it yet. For those savage creatures to expose their crude penises and vaginas like that... How barbaric!" she declared in anger.

"While it is indeed natural for animals to have genitals, those observed were of an unnatural size and length. I shudder to think what the effects of the corruption are doing to them." Nightingale mused with her hand on her chin.

"Are you OK, master? We should advance after you catch your breath." Medusa walked up to Fujimaru.

"Yeah, I've been in worse before. This is nothing." Fujimaru had to learn quickly the survival skill of resting and catching his breath quickly before moving on, with time being of the essence on many of his missions. "I'm fine. We can move o-" He lifted his head up to look at Medusa before stopping mid-sentence.

Had her tits been that large before?

"What's wrong, master?" Medusa looked at Fujimaru with concern, unaware. "No, it's nothing. I'm fine..." He used his chance to examine her closer.

Yeah! They've definitely grown!

Her C cup breasts had this faint pink aura around them, except not exactly the C cups he had known. Now, it was more like a D, and starting to grow a little every minute.

Fujimaru thought his eyes were playing tricks, so he looked back and his suspicions were confirmed! Mash's C cups were becoming D's too, with Nightingale's D cups expanding to an E, her already tight outfit beginning to strain as he pitied her shirt buttons. Raikou's motherly plump E cup breasts had reached F, looking more erotic against her skintight purple suit. Their asses and hips had grown larger and wider too, though they were unaware.

"Then I suggest we move on." Artoria's dignified voice called from the front, causing Fujimaru to turn around and see that Boudoca's E was becoming an F, and Artoria's arousing large G cup was becoming H, her turned body revealing her sideboob and growing ass putting his body to the test in not getting extremely hard.

"Of course." Fujimaru blinked rapidly to get the horny thoughts out of his mind, starting to walk again.

What kind of a singularity was this?!