If you're looking for manga similar to Aletheia, you might like these titles.
In 2018, the worst terrorist incident in the history of Japan occurred. It became known as The Helltopia Incident: a bus full of people disappeared only to be experimented on and turned into vicious monsters. Kamijo Tsunehiko is a victim of the incident, but unlike the others, he continues to appear human. True evil is on the loose, but is Kamijo the only one who can stop it?
"Kitty 101" was biologically created by a scientist named Troll by combining several strings of DNA with man-made DNA. She was also given an XY chromosome which turns her into a male on a regular basis. When she was a baby, Kitty 101 was stolen by one of Troll's scientists, Jason Haven, who wanted to save her from the experiments. He named her Mars Haven and brought her up as his own daughter because she reminded him of his lost daughter. Time passes, and Troll proceeds with his experiments on the ESPs under his disposal.
Beppu Yugo is one of the world's most successful and celebrated negotiators. His cases have ranged from big to small, from secretive to in the public eye. His work doesn't come cheap, but his skills are the top of the line, and through words, not violence, his failure rate is minimal. After a period of inactivity, Yugo is back on the job, to help negotiate the release of a hostage in Pakistan. With harsh terrain and deadly enemies before him, will he survive long enough to save the hostage, and return with his life?
What is the first thing you remember? For high school genius Calliope, it’s death. A bus crash, her best friend, her memories, they’re all gone except for one: Brantley Pharmaceuticals. The world’s leading technology company, they promise eternal life and...they’ve taken Calliope hostage. Experiment after experiment, her memories become clearer and clearer but reality all the more confusing. Where is she? What happened to her friend? And is she even Calliope…
Nagasawa Shiina is just an average 3rd year high school student until her parents' company goes bankrupt. In order to pay the bills, she sells herself into prostitution. At her first job, a mysterious masked man crashes the party... and it's someone she knows. Akumetsu is the story of Shou, a vigilante that's out trying to straighten the corrupt Japanese Government through terrorism with his "One man, One kill" code of action.
Cedric the researcher meets Specimen B612, who looks just like an ordinary girl. Will she be able to enjoy the little freedom she has, before being used as a killing machine?