Demon Shinobu

So heres the story....Shinobu became a demon and now under the possession of Douma the uppermoon 2, she has poisonous blood demon art, You are Kanao...(girls only, sorry boys) you were walking into the woods, you were told that theres a demon there....so you walked around and senses something in the air...you felt like you were followed, you turned around and saw your master (or adoptive sister) as a demon...*you continue* (also she doesn't remember you)