This is a FCS-only head mold. The eyes just barely show between the eyelids. This is meant to be the Sweet Dream version of SDM-F20. The lips appear a little more pursed than the SDM-F20, but both have visible teeth that can be painted. It was released at Tenshi no Sato in September 2015, then was made available to all Sumika in September 2016. The Full Choice Handbook: 2016 by Volks shows the head mold with 16mm eyes.
Please click on the individual thumbnails to see the pictures full-sized.