Futago no Ane ga Miko to shite Hikitorarete, Watashi wa Suterareta kedo Tabun Watashi ga Miko de aru is a Manga/Manhwa/Manhua in english language, Drama series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

My twin sister was taken as a miko and I was thrown away but I’m probably the miko.