I’ve Been Reincarnated as a Tentacle Slime~ I Want to Live a Comfortable, Secure Life and Do Whatever I Want~ - Chapter 21

On the third day of pregnancy, having reached the halfway point, the development of floors 1 to 3 was also complete. As things were progressing smoothly, humans tend to get greedy, and I started wanting to develop Rio’s b00bs. A flat chest isn’t my thing, so I’ll aim for a C-cup. For a girl like Rio, just having started her period, a C-cup would be quite magnificent.

“Rio, I need to ask something important. Can you hear me out?”

“What is it? If it’s something I can do, I’ll do anything.”

Rio answers me while gently rubbing her slightly swollen belly.

“In a few days, the slimes will be born, right? At that time, your b00bs might be needed. So I was wondering if I could make them a little bigger.”

For the time being, I listed some convincing excuses.

“I… my b00bs are small… Can you make them bigger, Master?”

With her fox ears drooping, Rio appears to be self-conscious about the size of her chest. I think this will work.

“I think I can make it bigger. Shall we get started right away?”

“Yes, of course!”

It seemed Rio was excited about her chest getting bigger, as she quickly took off her clothes and revealed her naked body to me.

◆◆◆◆◆◆◆

I enveloped Rio’s chest with my tentacles, flattening them, and then soaked the usual mixture into her br3asts.

“Ah… my b00bs are tingling… My b00bs feel so hot.”

Next, I coiled a thin tentacles around her n1pples and rubbed them while vibrating.

“Ah, my n1pples… it feels so good. They feel like a cl!toris… Mmm!”

I will massage the chest, her n1pples will be enlarged, and I plan to develop them from within her chest.

–

For about 30 minutes, I continued to stimulate her br3asts and n1pples. The cherry blossom-colored n1pples grew larger again, standing proudly as if asserting its presence, as though it were saying it would be ok to enter her n1pples.

“My n1pples have grown bigger… Mmm, haah! Kufuu…”

“With this, the preparations to make your br3asts bigger are complete.”

I continued stimulating her n1pples while changing the shape of the tentacles on her br3asts. I transformed the flat tentacles into cilia.

The cilia penetrated into the inside of the br3asts through the n1pple openings. The 20 or so n1pple openings on each br3ast were mostly closed, so the cilia could not enter inside. I rotated the cilia like a drill, piercing the closed n1pple openings and forcibly penetrating inside.

“Ah… Master is entering inside my b00bs, fuu… coming in… ahh!”

The tentacles cling to the n1pples, covering them and from inside the tentacles, cilia-like tendrils enter the n1pples and move into the br3asts.

The cilia pass through the milk ducts, branching out into tentacles that lead to the mammary sacs that produce milk, reaching all the lobes of the mammary glands. The underdeveloped br3asts still have small mammary sacs.

“Master is inside my b00bs… fuu, my b00bs feel kind of strange.”

I suck up every last drop of the milk that has gathered in the mammary sac.

“How sweet. I’d like to replenish all my fluids with Rio’s br3asts.”

“Please suck a lot… nngh, fuu, I’ll give everything for my Master… haa.”

Instead of sucking up the milk, I fill every mammary sac with mucus. The growing mammary sacs will likely become larger just from this. Also, I fill the milk ducts that are branching out and forming mammary sacs with mucus, promoting the creation of new mammary sacs.

This time, I think I’ll skip the sensitivity development and expansion. First, I need to grow Rio’s br3asts. I removed the tentacles from inside Rio’s b00bs.

“Ahhh… the inside of my b00bs feel all tingly. And my br3asts are so hot.”

Rio was writhing about from the sensation of the tentacle withdrawing from her br3asts.

“I think it’s growing. It should get bigger little by little.”

◆◆◆◆◆◆◆

The next day, when I came back from the 8th floor, Rio’s br3asts were no longer flat. They had a slight curve, and could now be called an A cup, or at least something close to it.

“Master! You did it!! I have br3asts now!”

Rio, in high spirits, hugged me tightly. Her expanded belly pressed into me, contorting slightly.

“Congratulations.”

I stroked her fox ears and tail that were standing up with a tentacle.

“Hinya… the tail is off-limits… fuu…”

I stroked her tail until Rio went limp and completely melted into me.

This time’s results:

・ Is the tail her weakness?

Chapter length 1834 characters.