If you're looking for manga similar to Kuusou Kagaku Edison, you might like these titles.
For the last 400 years, an island has been completely surrounded by walls, isolated from the rest of the world. Aira and Marue have always dreamed of voyaging outside the walls, where lies a devastating truth unbeknownst to them.
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Edison and the Island one shot (from Koi no Kamisama) take place in remarkably identical worlds - a city sits behind a large wall, and the citizens aren't able to leave. What lies past the wall? Read these manga and see for yourself.
A floating ring has been passed down through Mikko's family for generations. Her grampa told her that the ring bears a promise of reuniting with lost ones who departed to the "other world." Mikko explores her world -- an endless network of tunnels -- in hopes of finding the "other world" one day...
Levi, Isabel, and Furlan live in the underground city beneath the royal capital. But a chance encounter with Erwin Smith soon changes their lives forever...
Tomorrow is the fated day that Annie Leonhardt must carry out her mission, no matter the cost. But first, she decides to investigate the disappearance of a wealthy businessman's daughter. Later, Mikasa reflects about her younger years with Eren.
Airi is an average 12-year-old girl. She goes to school, hangs out with her friends, and loves being outdoors. The thing is, she can only be outside for 30 minutes a day. Welcome to Airi’s life. A catastrophic nuclear war reduced the world to a radioactive wasteland and forced her and other humans to live deep underground. But, this doesn’t bring Airi or her friends down. As they explore aboveground, they make shocking discoveries not taught in school. What do Airi and her friends unearth?
A village, hidden in the forest, holds mysteries… But what happens when a foreign girl enters it?
The young Erwin Smith is a rising star in the Survey Corps, humanity’s only hope of defeating the man-eating monsters known as Titans. Ruthless and dispassionate, Erwin’s mind is devoted to strategies and intrigue. But beneath Erwin’s feet is another world, the Underground, where humans are born and die surrounded by the garbage the Capital throws away. Here, the criminal Levi survives on his wits and agility. But when these two ambitious men cross paths, who will prove himself stronger?
The story centers around Anjie, an electric doll, and Erio, a human raised by her. In order for Erio to experience the outside world, the two set out on a journey.
Long ago, angels and demons engaged in a fierce war; and to keep humans safe, angels built the city of Ilvia. In the center lies a walled sanctuary where special children must live until their fourteenth birthday, at which point they graduate and leave for paradise with Amalda, their angel caretaker. Akira, Yuno, and their friends are about to turn fourteen, and their curiosity leads them to sneak outside of the walls for a peek of paradise, not realizing the horror of what awaits them...