Commissioned by Natsumemetalsonic

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Koneko - Nee-san you sure this will get me a body like yours.
Kuroka - Of course, how do you think we look so different.
Koneko - Okay, URF! wish the girls wouldn't move so much.
Kuroka - Don't worry they'll be apart of you soon.

Koenko - Large, Warm, Squishy Belly.
Koneko - Why must they struggle for so long.

Koneko - Wow, this is amazing, my body is finally fully developed. I can't thank you enou . . . . nee-san what are you doing!!
Kuroka - just helping you get a feel for your new body.
Koneko - No, stop, there so sensitive now.
Kuroka - Really, then lets see how sensitive they are.
Kuroka thinks - These are nice, also since they are larger than mine, they are very squishy and fun to play with

One day Koneko looked around her peerage and female friends. Everyone she knew had a curvy body and was left behind. Kuroka saw her sister looking down while training and asked what was wrong. Koneko explained the situation with Kuroka understanding it. She told Koneko that they had the same body figure with Koneko asking how she got a buxom figure. Kuroka agreed to help her but Koneko must do whatever she says, which she agreed to. Kuroka then brought in multiple girls and started to force them down Koenko throat. Koneko tried to stop it but Kuroko reminded Koenko of the promise to follow it through. Koneko stopped resisting as her sister kept shoving more girl down her throat. Afterwards Koneko had a massive stomach with multiple girl inside her. Due to the weight she couldn't stand up anymore had sat down on a chair. Kuroka seeing the chance jumped on Koneko belly, which she felt. Koneko asked her sister will this help with her replying it will because it worked for her. Koneko said fine but stated that the girls were moving frantically inside of her. Kuroka replied saying she'll get use to it while she plays with a victim girl chest. Due to Kuroka playing with the girls inside, Koneko felt something coming up and burped out multiple clothes from the prey inside of her. (I'll leave it to your imagination if she swallowed her girls from her peerage or friends)

Koneko managed to get to her bed while carrying her massive belly. Koneko fell asleep with the girls inside of her starting to digest. However Koneko was struggling to digest the girls due to the sheer weight she had to digest. This caused her to sweat across her body and belly.

After an unknown amount of time Koneko managed to digest all the girls in her belly completely. The end result was her gaining a curvy body that her sister promised. Kuroka appeared at her sister side with a victorious smile. Koneko was thanking her sister while she was feeling her new body. While she was saying this Kuroka looked at her sister body and was both amazed and envious of her end result. Kuroka then came up with a plan while having a cheeky smile. She suddenly grabbed Koneko boobs and started to feel and play with them. Koneko was startled by this and asked her what was she doing. Kuroka just said she was helping her get use to her new body. koneko asked her to stop because they were very sensitive now. Kuroka hearing this replied that maybe they should see how sensitive they were. She started to play with the even harder, which Koneko felt. Kuroka feeling her sister new boobs stated nice. This was due to them being bigger than hers, which made them very squishy and fun to play with.

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