If you're looking for manga similar to Heaven's Memo Pad (Light Novel), you might like these titles.
Follows Kimihiko Kimitsuka, a young man who four years ago became the assistant of a mysterious detective known as "Siesta" on a hijacked airplane. Together, Kimihiko and Siesta went on mind-boggling, globe-trotting adventures while combatting a secret organization, but all of that came to an end when they were separated by Siesta's death. In the present day, Kimihiko tries to return to an ordinary, boring life as a high school student, but things are never that simple, even though the detective is already dead.
Half a year after moving to Kyoto, high school girl Aoi Mashiro brings her late grandfather’s old scrolls to Kura, an antique store nestled in Kyoto’s Teramachi-Sanjo shopping arcade, for an appraisal. One thing leads to another, and she winds up working there part-time. The manager’s son, Kiyotaka Yagashira—nicknamed the “Holmes of Kyoto”—is uncannily perceptive, and together, they solve strange cases relating to the antiques brought to them by clients.
Your Forma, a miraculous brain-threading technology that was developed to save thousands of lives from a massive outbreak of viral encephalitis, has become an integral part of everyday life. Begrudgingly partnered with Harold, of the “Amics” line of androids, officer Echika must use this invasive technology to hunt for clues and crack cases in a world where your every sight, sound, and emotion is being recorded.
Saitou Yakumo is a young man with a very special gift: he can see the souls of the dead and communicate with them. When the aloof student isn’t duping his fellow classmates out of their money with fake card tricks, he takes on paranormal cases that pique his interest. Making use of his unique abilities, logical mind and his contacts within the police, Yakumo strives to solve each supernatural case he takes on and bring those responsible to justice. But when the youthful detective becomes the target of a sinister duo can he get to the bottom of their scheme before he is dragged into a world of darkness and hatred?
The return of the famous teen detective, Kindaichi Hajime. With his keen intellect and sharp wits, there is no case he cannot solve, in the name of his grandfather!
Shion Nichigami loves reading and is extremely shy, but when she removes her glasses, Shion becomes a detective called "Nazotokihime".
Tachibana Sakon is a skilled puppeteer with an unusual hobby: solving murders. Along with Ukon, a one-of-a-kind puppet made in the Meiji era, Sakon manages to find himself in a variety of life-threatening situations. Join the duo as they put their detective skills to the test in terrifying cases of revenge, malice, and murder.