: This is likely the production code or ID for the specific title. S1 (Style 1) : Refers to the production studio, S1 No. 1 Style , a prominent Japanese adult video (JAV) manufacturer.
Within private trackers, DDL forums, and scene release groups, “meat” is jargon for the primary audiovisual content—the full-length feature as opposed to samples, menus, or extras. It can also imply: rei+kuroshima+sone187+meat+s1+no1+style+verified
