A behind the scenes type of Doujin? Yes, this is Hijiri Tsukasa detailing his guest consultation in the latest AV production for the H na Fuushuu series, here he portrays himself as a cute busty mangaka lady, putting a note where he claims to be a chubby old man in real life, reporting the time where he was actually invited to watch the AV being filmed on location, during a precious adaptation he wasn’t called to be on set so Tsukasa was eager to see it live.
Tsukasa even makes a plug to advertise the actress playing Chiaki Kamona, being thankful for her work. It’s Anzu An / あんづ杏 for anyone interested.
In the end there’s a tease about Hijiri being personally contacted by a AV actress (kept a secret) who wants to play the role of Haruko Kamona, apparently she was a fan who owned an original copy of Haruko’s chapter and took it to get Tsukasa’s signature. However, the rest of this story he wants to tell another time, so a sequel to this doujin is happening one day.