NASA announces the discovery of a new planet in the solar system, Emanon, where life might exist. Working part-time at a travel agency, Mika is doing her Master's degree in theoretical physics. She hasn't been able to get over her boyfriend who disappeared five years ago. One day, Mika suddenly experiences déjà vu and meets a version of herself. Emanon might have caused the parallel world to intertwine.—Takuya Fukushima