Retreat from reality and the consequences of escapism are important themes that play a major role in the series. The image of burning memories to forget them and so escape them is used throughout the latter half of the series to symbolize the theme of escapism. For the characters Misuzu and Yoji, their retreat from reality has devastating consequences: Misuzu enters a despairing insanity after being forced to realize the truth of her reality, while Yoji goes through a mental breakdown as his reality is no longer the fantasy he believed it to be. However, the question as to how people should live their lives goes unanswered by the series. Later on in the series, retreat from reality is revisited in the form of Poom Poom, who represents the ultimate escape from reality into childhood.