If you look at the other Sakurako art, it's clearly her, dood.
Hair's too short and the face isn't rounded enough. It's more like Haguro than anything, but without tags on Pixiv or her uniform and hairclip we couldn't say it's her either.
It looks like OG art.
Also, I just checked the Twitter text.
"Dokyō no tarinai saimin ojisan."
That's not KC or Sakurako. Please use the Uploader page and include commentary in cases like this.
Also, this is why you should pay attention to pixiv tags, always copy the commentary (it's just a check box!), and upload the images with text so people can have context.
The basic joke here is that it runs totally contrary to expectations from appearance alone.
It's worse than I imagined....Oh, but those are my tastes.... Your husband has some nice tastes.Then after that, he came inside me while I took a shit.Wut?I was given a massive enema and a golf ball deep inside me while I gave a tit job three times in a row....What kind of sex play did you have last night?I hypnotized the neighbor's wife.
I thought I'd have her talk about their sex life while I was sticking it in.