It seems we're going through the girls' younger years now. Could be interesting...

たまには

夫婦以外も描いてみようという試みです。夫婦と関係あるかどうかは私も知りません。

Once in a while

This is me trying to draw something other than the wives. Even I don't know whether or not she has anything to do with those two.

We may yet get some kind of wacky high school antics. Keep your fingers crossed.

[EDIT]Looking at the comments, the artist says he has no plans to make any kind of relationship between the three. It's a nice picture, at least.

I still hope he introduces some kind of relationship between them later.

Like maybe it's a young version of real_xxiii's_dark_skinned_girl before meeting real_xxiii's_ahoge_girl, who helps her come to terms with her sexuality and come out of the closet.

...he should really make a story about these two.

real_xxiii's_dark_skinned_girl has inverted nipples though. This girl doesn't