This headmold is FCS only. The 2021 Full Choice Handbook notes that this sculpt has visible teeth. It was released in Japan on March 21, 2020 as a Tenshi no Sato exclusive. It had a limited Tenshi no Mado release from November 19th, 2021 though January 10th, 2022.
Please click on the individual thumbnails to see the pictures full-sized.