Mahou Shoujo Lyrical Nanoha - Onee-chan to Issho (Doujinshi)

A 18 pages long doujin from 2009 about young Nanoha and Fate living in a world where Fate has Alicia as her older sister. This is a cute NanoFate comedy and romance with a jealous Fate and a time skip to Nanoha and Fate's days as teenagers.