Shishimai to Touken

In a world where the walking dead - known as Jiangshi - have become integrated into human society, protagonist Yintao's parents are murdered by a mysterious Jiangshi named Maomei.
By an inexplicable twist of fate, Yintao ends up living together with Maomei.
What secrets lie behind their origins and this mysterious world?

(Source: MangaPlus)