The story is rooted in a modern Japanese "creepypasta" that first gained fame on the (2chan) message boards around 2008.
: Analyzing how Japanese urban legends are repurposed into "monster girl" tropes. A-Summer Memory with Hasshakusama – NekoPoi
"A Summer Memory with Hasshakusama" refers to a popular Japanese adult-oriented anime (hentai) produced by , based on the urban legend of Hasshakusama (also known as the Eight-Feet-Tall Woman). The story is rooted in a modern Japanese