铁男是一个长的很男生的女生，他一直喜欢一个女生，却不敢表白，曾经偷偷的写过一封信，却一直没有被回复，最后知晓自己没有勇气与她在一起后，她把自己的想象写成了小说，在故事里，她是男生，在地球被荒废掉的时候踏上了逃亡火星的飞船，而她喜欢的女生，也在病痛和垂幕中，悄悄地想起了她

Tie Nan was a masculine girl. She liked a girl but dare not to confess. She wrote a letter secretly but was never replied. After she recognized that she didn't have the courage to be with the girl she like, she wrote her imagination into a novel. In her story, She is a boy who gets on the spaceship fleeing to Mars when the Earth is ruined. The girl she likes think of her secretly in the girl's dusk and illness.