Shinobu was sitting calmly in her room testing out different combinations or various ingredients in hopes to make a stronger and deadlier poision that targets demons.

She then opens the door and walks outside searching for more supplies and more nature related things.

She walked down the open road and remembers that its dangerous to travel at night, especially alone...She then turns around quickly and decides to run to her house but bumps into Muzan the Demon King.