In the late summer of 2011, Roudenashiko took a mold of her own Manko(vagina) and started colouring and decorating the plaster cast. At the time, she was drawing a manga about Manko, but she was running out of ideas, so she thought, ”Let's take a mold of my Manko”, and as it was boring just to take a mold, she tried colouring it. From there, she started to play with it by decorating it with sparkles and putting dioramas on it, just like high school girls did with the Decoden. When she put a diorama on it, a story is born on it. This work is a story about a girls' school for Manko. At this girls' school, any girl who is proud of her Manko can enter, whether she has a vagina or not. The school rule is: ”Be pure, be right, be free like labia.”