Also known as: これ絶対入ってるよね, 这绝对插进去了吧, 騎乗位カーテン
Penetration that is hidden by clothes (usually a Pelvic Curtain, Dress or Skirt) or an object held by the character. Often the penetration is partially visible through a See-Through Silhouette.
The equivalent of Fellatio Under Mask but for Sex.
Do not use this tag for Convenient Censoring or other foreground objects that have no relation to the scene. Do not use this tag for X-Ray.