The series consists of four distinct episodes, each focusing on a different "secret" or scenario.
: In Japan, "Papa Katsu" refers to sugar daddy relationships where younger women receive financial support or gifts from older men. Conversely, "Mama Katsu" refers to sugar mommy activities, where older, often wealthy married women sponsor younger men.
Introduces the primary characters, establishing the emotional void in the mothers' lives and their initial descent into the world of Mama Katsu . It sets up the tension between their respectable daytime personas and their secret nighttime activities.