https://www.dlsite.com/books/work/=/product_id/BJ242008.html
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Chapters 01-04: https://e-hentai.org/g/2565076/3d6e1767b8/
Chapters 01-04 (Chinese): https://e-hentai.org/g/1762902/659121b357/

"I'm so excited that I can't investigate...!" Infiltrate! Rumored pleasure massage parlor

I have to investigate the reality of this place, but...if you rub me like that, I'm going to be made to cum..."
Murasaki Akizuki, a magazine reporter, attempts to go undercover at a women's esthetic salon under the direction of a senior reporter who says that the place smells a little fishy. Under the direction of a senior staff member, she attempts to go undercover at a women's only esthetic salon.

She was surprised to find that the therapist was a man...but there was nothing suspicious about the massage or the staff.
I was relaxed and thought, "I can't rely on my senior's reading..." But then, the treatment became more severe...? I was so relaxed, but then the massage started to get more and more aggressive...
"You're really stiff here, too, don't you think?
I'm going to expose this place for what it really is...! But if you keep playing around with me in such a comfortable place, I can't do it anymore, I can't do it anymore...!