They're from the now defunct Messy Models Asia site. That's Koko on top and Arisa below. More info on the site's closing here: https://umd.net/forums/mmasia_site_and_store
Thanks for friending Shiny Girl, and for introducing me to "Yum Yum Video". We MUST find more of it; maybe put a post in the Messy Forum requesting it? Users here are pretty helpful. Cheers! ;-)