If you're looking for manga similar to Beongae Atom, you might like these titles.
Weiss has one dream and that is to see the sky. The city that he and everyone else lives in has a large and what seems to be a never ending ceiling. With the help of his friend Nero, Weiss plans to one day break through to the top and see the sky that no one has ever seen. On one of their missions, Weiss and Nero meet a mysterious girl in black named Nowall who tells them that there is no sky, but before she can completely explain, she gets abducted by the Black Police, a peace keeping robot squad. Now Weiss and Nero have to rescue Nowall and learn the truth about the sky. What they don’t know is that the truth is way over their heads.
Ginga is a passionate Blader who travels from place to place, searching for strong rivals so that he can become the best. His journey leads him to a new town where he saves Kenta, a young, would-be Blader, from the hands of the nefarious Face Hunter gang - a group that forces weaklings to battle to forcefully steal their points. Alongside newfound friend Kenta, a Beyblade repair store's daughter Madoka, enemies-turned-friends and more, Ginga will battle fierce rivals, challenging opponents and even the one who caused great tragedy in his past - all on his way to becoming the best Blader of all!
Kokoro found a strange machine in her basement, as well as a variety of problems to solve!
In the year 2020 it became possible to travel to the "electric monster world" using special portable telephones. Making friends and sharing telephone numbers with the "electric monsters" became popular among humans. Our protagonist, Shigeki, is one such person. Although he originally arrived in the electric monster world on accident, he became determined to travel the world with his new electric monster companion Kuribute, and make more new friends while he was there.