This is the Content ID (or code). In the world of Japanese adult media, the ID is more important than the title. Searching for "MAD-27" will yield much more accurate results than searching for the actress's name alone. Hiyori Shirai: The featured actress/idol.
Hiyori Shirai remains a favorite for many fans of the Glory Quest label due to her "girl-next-door" aesthetic and the high production value the studio brought to her early "MAD" series releases. These videos often focus on a mix of cinematic photography and niche themes that helped define the studio's reputation in the mid-2010s. glory quest mad 27 hiyori shirai avi 1 3 gb portable
To find exactly what you're looking for, it helps to understand the "scene" naming conventions used in the title: This is the Content ID (or code)
If you want the highest quality (HD/4K), sites like DMM (Fanza) or MGS (Magic Garden Scene) allow for digital purchases or rentals, though they often require a VPN for users outside of Japan. Hiyori Shirai: The featured actress/idol
This is the production studio. They are known for high-quality solo idol releases.