The in the search phrase is a reference to South Korea’s age rating system . The Korea Media Rating Board (KMRB) classifies films with an “18” rating for content requiring adult discretion, such as explicit sexual scenes, violence, or mature themes. All Adultery Alumni Association films carry this rating.
In South Korea, the Korea Media Rating Board (KMRB) applies an "Adolescents Not Allowed" rating (effectively 18+ or 19+ locally) to films featuring explicit themes, violence, or sexual content. 18 adultery alumni association 2 2024 korean m 2021
: The official English translation of the movie 불륜 동창회 2 . The in the search phrase is a reference