Personal Purchase from:
https://www.suruga-ya.jp/product/detail/ZHOU22456

https://doujinshi.wiki/book/1086951

This book is basically an official expansion of a scene from the OVA, Iyashite Agerun Saiyuuki. There is one scene in the OVA where Tsutomu blackmails Mayuko briefly and gets a blowjob from her. Its glossed over very quickly, but here, artist and animator, Suzuki Takuya, expands that scene with a before and after. He was also a Mechanical Designer for Geppy-x, which you can find behind the scenes artwork in another Studio Max book I uploaded, Shin Reyon Densetsu.