Oh, I see what you mean. Yeah, even among Raita’s already-bony designs, some of the girls are extra-skinny and this second-order doujinshi was about that. Never seen a rib-job before, thanks for expanding my mind.
I recommend the original series by Raita, actually. It’s not cuckqueaning but it feels a little cuckqueaning-adjacent, and his girls’ designs are very pretty.