Yumekui Merry begins with Yumeji Fujiwara, a seemingly average high school student. But ten years ago, Yumeji gained the ability to see the dream auras of other people around him. This ability allows Yumeji to predict what type of dreams people are likely to have next. The dreams of others may not be a mystery to Yumeji, but his own dreams have recently left him puzzled. In dream after dream, Yumeji has been pursued by an army of cats lead by John Doe, who claims he needs Yumeji's body to enter the real world. These strange occurrences get stranger when Yumeji meets Nightmare Merry, a dream demon seeking to return to her own world. Using his powers, Yumeji decides to assist Merry in getting back home. But Merry's very presence in the real world means that the barrier separating dreams and reality has been broken, and not all of the dream demons intend to come to Earth peacefully...

Outspoken Luise and shy Lotte meet at summer camp and realize they are identical twins who were separated at birth by their divorced parents. The girls become friends and decide to switch places with each other so that they can each learn about the parent they never knew, and perhaps bring together their broken family.

In the anime series, the members of Six Gravity and Procellarum are all living in the same dorm building. Hajime Mutsuki and Haru Yayoi, the oldest members of Six Gravity, are first year university students. Each episode of the series will feature a different main character. (Source: MAL News)

The history is placed right after the -cliffhanger- end of Godannar when Anna looks surprised to see Mira driving the Neo Okusaer.