At the age of 11, Maeda Sae lost her mother when a drunk driver rammed into the side of their car. It was a miracle that Sae and her father escaped alive. But because of the accident Sae lost the ability to use her left leg normally. While at the hospital she acquired a habit of smoking and learned to be perverted thanks to the old men at the hospital. Sae and Iizuka Tsukasa (The stories hero) were each others first love. Sae always loved watching Tsukasa run. And on the day Sae had to leave for Osaka Tsukasa and Sae made a promise that when they become adults they would have sex.