Karui Kimochi de Keijiban o Arashite Itara Kyuuketsuki no Imouto Kenzoku | The story of becoming the vampire princess' little sister underling because you spammed the imageboards.
(Reitaisai 15) Watashi no Imouto ni Inmon ga Hatsugen Shita no de Chinko Hayashitara 4-nin ni Fuete Yoru ga Owaranai!! (Touhou Project)