Episode Title:
Gateway to the Past.
Episode Description:
Kaori falls in coma. This leads Sō in pursuing medicine to save her. In the near future, Nagisa constructs Hanamiya General Research Laboratory at Uchihama Academy. Inside the laboratory, Sō and Airi meet Shiori as part of the research team that planned on recreating a synthetic body similar to Yui since Nagisa found out that she was an artificial human being. The team will then transfers the consciousness of the original Kaori to the synthetic body but the experiment ends up in failure. As he studies methods of saving Kaori, Sō stumbles on Kenny's research paper about time travel and decides to send Yui back in the past instead.
