When her foster father passes away, Lin Xiao Mei is surprised to learn that he left his magic theatre in her keep. Still deeply sorrowful of her father's passing, she did not expect her heart to broken again; this time by her childhood lover as well as fiance, Jin Xiu, who decided to leave her in pursuit of fame and fortune. Mending her heart came from the most unexpected source - Wu Jun An, a young man from the country who wanted to be a judicial officer... but instead found magic to be his calling. All things appeared to be going well for the two, until Jin Xiu decided to re-enter Xiao Mei's life again and a love triangle forms...
《進擊的巨人外傳小說《進的巨人 Lost Girls》將進行動畫，預計會隨著畫的第24~26卷同捆推出，一共三話，每大約為25分鐘。 《進擊的巨人 Lost Girls》是2014年推出的漫畫外小說，主要講的是漫畫中三與阿尼這兩位娘的在漫畫之一些不為人知故事。小說分“Lost in the cruel world”、“Wall Sina, Goodbye” 和 “Lost Girls” 三篇， 由于是跟隨漫畫推的，因此三集畫上市的具體間為2017年12月8日，2018年4月9日，2018年8月9日。
