We will find out this Thursday when the next chapter is released.
Not sure yet if it will be "The second half" of chapter 13 or if it will be chapter 14. But either way for now it would seem that they will be releasing shorter but more frequent chapters(released every two weeks).
Unfortunately there is no bikini shot of her so you will have to wait for the beach chapter(s) to see her in one.
As a compromise, here is her in the shorts used to promote the series( this was before the manga came out).
She canonically has bigger breasts than Milk-sensei btw.
These are previews that the Mangaka posts on his Twitter/X.
Thr next chapter will come out this Thursday.
Go follow him, he is a cool guy and has plenty of art in his Media page. https://x.com/odadouma
Also he reposts fanart made by others for the series if that matters.
And some for new and old news,
New News: The manga seems to have a new release schedule of releasing half chapters every two weeks instead of releasing the entire chapter during the first Thursday of the month which is why the chapter seems shorter than usual.
Old News: The first Volume of the...
Also Volume 2 of the manga came out last Thursday. So try to support the Author and Mangaka if you can.
There is also some nice bonus art in it which includes Cynthia, Lilith and Carta.
Shimizu and Aoyagi looks a bit like the Main Cast from "My Ex-Wife is Young Again and She's in my Class" so my money is that they have some complicated romantic related past.
Not going to lie. That Soul Bond spell is pretty handy with the way you can utilize your harem's feelings.
More harem series need to have something like that.
The mangaka has also released some new(not really) art.
It's the one he used for the Cover of the July edition of the monthly Shounen Ace and a piece He used for a previous chapter(Just now without any marks).