Semeru Ojousama by one of my favourite artists Yamahata Rian. This is a unique work in multiple ways. It's the debut work and full color. And it has been totally forgotten and was never translated, I guess. I'm incredibly grateful to have stumbled across it, even though it's only a 8-pager.
First: OH, she even showed her boobs, and she's stroking the guy's penis just fine. Is that really Yamahata Rian's work? Woah! This dude's so lucky! Later: ... nevermind! The dude's fucked!