A Sea of Brushes

Ginko arrives at a secluded place to meet an old acquaintance, who seems to be in charge of a lot of an archive of confidential text. Ginko is allowed to read the text and ends up reading some of the writer, Tan'yu's work. Tan'yu is the descendant of the Karibusa family being born with a black mark on a part of their body. This means she contains devastating Mushi within her body but Tama is there to help remedy that.