Found them, they are Shiina Sora and Katagiri Eririka (aka Tsukishima Nanako).
Together they're known as "Bibians", if you search it on youtube there are several safework videos with their normal life as a couple.
More cynical people think them being a couple it's just a marketing ploy, others who have been following them on social media for years swear they're real, think as you wish.
Apparently some months ago there were rumors of their breakup, but it seems they continued releasing videos after that so who knows.
This is the website of their jav label:https://www.bibian-av.com/top/