You can get this image sets on gumroad! Please check on Gumroad.
Gumroad link : gumroad.com/hoobamon
To me, she looks as if she just finished an orgasm. She's feeling a bit embarrassed about it, and she clutches the chair for some relief. The situation is a bit awkward.
In a good sense, Hoobamon, it's not the usual pinup. There's a story behind the image - which makes this more like art and less like pornography.