Secret Garden by Amagatsu Toriko and Egawa Hiromi — Ongoing

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This is a different manga from the similarly-titled one by Fujii Mihona.
This one bills itself as a "nonfiction manga" about a couple who are based on real people. Misono and Masami are working women in a long-term relationship; they even live together. Most of the story revolves around their sexual exploits, but there are also some sweet domestic moments.

Chapter 1: Sweet Home released Aug 20 '13 Non-moe art