"Little-devil (or demon) Swallowtail [butterfly]"[3]) is a Japanese magazine that introduces the latest fashion and lifestyle trends popular among hostesses that is published twice a year, with the main target audience being women in their teens to 20s.

Fans of the magazine are also referred to as "agejo" (age嬢, a combination of "Ageha" and "Lady") and often members of the Gyaru subculture.

[9] After multiple bankruptcies, Koakuma Ageha was revived as online magazine on January 5, 2021 with special physical issues releasing bi-yearly since May 26, 2021.

[11] Models talk actively about their "darksides" in their own way, and often reveal some "negative secrets" about their lives and pasts, such as the ones about delinquency, running away, hikikomori, bullying, betrayal, heartbreak, mental illness, trauma, suicide, self-image issue, sexuality, loneliness, abused childhood, domestic violence, and alcoholism.

[17] Shizuka Mutoh, an irregularly appearing Ageha model, launched her own fashion brand "Rady" in 2008 and its monthly net earnings reached $1 million in April 2011.

[19] Ane Ageha is a bi-monthly fashion and cosmetic magazine, and its target audience is females in their late twenties and older.