『Flutter, Flutter, Butterfly』: Based on a history of Japanese forced prostitution during the Second World War. One of the worst cases of sex slavery is from an unlikely place and time: Japan...the Second World War. Different estimates say between 20,000 and 400,000 women from all over Asian were forced into prostitution to "comfort" the soldiers. This fiction book gives the often forgotten history of how it happened, who was involved, how they were treated, and the apology that came years later.