: High-end studios like S1 often use professional lighting and scripted segments to give the production a "cinematic" feel, which frequently leads to confusion with mainstream TV series for those unfamiliar with the labeling system.
: Using "Middle-aged" or "Father" figures is a standard narrative device in the S1 catalog to create a contrast with their lead actresses. : High-end studios like S1 often use professional
: The "SSNI" prefix belongs to S1 No. 1 Style , one of the most prominent adult film studios in Japan. : High-end studios like S1 often use professional