If you're looking for manga similar to Aoharu x Kikanjuu, you might like these titles.
After being fired, high school student Shirono Akifumi happens upon "Rental Hoodlums," a service that might be the job he's best suited for.
Follows the adventures of a scientist Haiji and his assistant Chitose. One day the doctor is called to resolve a mystery about a glowing corpse. From the will of an unknown power the corpse then transforms into a monster and Haiji has to defeat it, to learn all about a mysterious black apple which can regenerate itself and which when eaten will enable someone to control gravity...