That little 4-panel insert where Saeko does it with a guy was really good.
But she should have kept the money and gotten something for the 2 of them instead.
It was also funny that the other girl did to the main girl what she had wanted to do to her (great minds think alike, I guess).
Now a sequel would be nice.
This story could do with a sequel.
And it would have been nice to learn more about why Youko had been selected by that girl. But maybe it was all just in her head? There's no need to have sex to harvest eggs, after all.