Pretty Guardian Sailor Moon is a Japanese manga series that appeared in girls’ popular comic magazine Nakayoshi from 1991 to 1997. The story is set in Azabu Juban, a lively district in Tokyo where, during the day, its protagonist Usagi Tsukino and other characters live happily. Yet once it gets dark and the moon full, things change. In the moonlight, Usagi and other girls transform into Sailor Guardians to battle against villains. Over the streets you can see “Crystal Tokyo”, a future city of the 30th century depicted in the series.