This metadata confirms that the video was released as part of the "Meccya Shitai!! Kai #054" series, which typically features scenarios with high school-age amateur girls.
: This acts as the publisher or series identifier. In vintage web media, serialized content was frequently labeled with specific alphanumeric headers so enthusiasts could compile complete collections. 1000giri 130614 keiko 720 high quality
Including the performer's name serves as a critical search tag for database indexing, allowing cross-referencing across different series or production houses. This metadata confirms that the video was released