If you're looking for manga similar to Dokyouboshi, you might like these titles.
Coil is a man whose idea of "life" is his alter ego in an online world. A place where the hearts of people come together...and it is not a pretty place. The slender spiderweb that connects their souls within this endless world brings greater pain than reality itself.
A floating space without gravity where an infinite number of lights shine in different colors: The "Box of Wisdom." Inside of this box, there are multiple worlds, multiple timelines, and there used to be many different people. This is where Dual and Dorothy were fighting with enemies called "Viruses." Worlds infected by viruses must be erased. That is the duty, the job of these girls. However, one day, Dual and Dorothy feel the presence of a new Virus. Arriving at the scene, they see a girl being attacked by Viruses. After saving the girl, the duo wait for her to awaken so they can ask who she is, where she came from, and where she is going. Finally, when the girl opened her eyes, she gave her name, Rimo, and whispered only one sentence... "I must return to the flower patch..."
The earth is strange. Everyone thought so. Disasters that are intensifying year after year. Heat waves, heavy rains, large typhoons ....Researcher, Yutaka Tsukimura promotes geoengineering to stop global warming. On the other hand, his twins, Ryo and Iko, were supposed to live a normal life with her pregnant mother Yuko. Antarctic earthquake and rising sea levels... This is the story of two twins fighting against a collapsing earth.
In the future, in a rush much like the American gold rush, many people emigrated to our solar system's asteroid belt to mine the asteroids. A society developed out in the belt, and the citizens, who were generally looked down upon by Earth citizens, came to be known as "Belters". Eventually, this community sought independence from the earth, ushering in a war. The Belters could not stand against the Earth military, and they were defeated, falling back under the harsh control of the earth. Twenty years later, an old man called Bou discovered a still-living baby in a tank within the wreckage of a ship from the war. He named the boy Cross, after the Belter's greatest hero, and raised him with the hope that he would grow to become a messiah for his people. At the age of ten, Cross is captured by Earth soldiers and forced to leave his guardian's care. What connection does this young boy have to the legendary hero Cross?
In the middle of a high school assembly, all of the students suddenly collapse. The one behind it all is a girl named Mao who holds a grudge. She's out for revenge against the entire school!
Michiru visits the land where her dead lover, Akira, had previously visited; a fortress on a solitary island. The queen that she meets there resembles someone she knows very well.