Within the fandom, the event is often referred to as Mizu5, in reference to it being the fifth event featuring Akiyama Mizuki as a focus character. Became a meme, as Mizuki's shocked face in the event's featured card became a common reaction image following its posting by the Japanese Project Sekai X account teasing the event. The event story's developments involved Mizuki being apparently outed to Shinonome Ena as having been born male by two of their schoolmates, sparked significant debate within the Project Sekai fandom as to the question of Mizuki's gender identity (which remains not officially confirmed).
