If you're looking for manga similar to A Riverside Date, you might like these titles.
A robot on a solitary journey in a world that has ended. Ars aims to help the human survivors' by taking their bad memories and "killing" them. They also want to learn more about humans and their relationships with each other. A fragile but gentle journey to the end of the world begins...
Japan, the most powerful country on Earth, is ruled by a system described as the evolution of capitalism: the National Quiz! This bombastic game show airs each night, and thousands of citizens from around the country eagerly wish to participate. Those who win have a single wish granted by the Japanese government, from a cure for leukemia to even the capture of the Loch Ness Monster, while losers are branded as war criminals and severely punished. However, while many dream of playing the National Quiz, not everybody is happy with this institutionalized free-for-all. The Hardcore Sect of the United Anti-National Quiz Front is armed and furious at the Quiz’s questionable ethics, and will do anything in their power to take out its flamboyant host, K-i K-ichi!
Yuria is a humanoid dutch wife (love doll), a female android designed with the sole purpose of being the sex slave of her master. But she has one flaw: she doesn't want to be a dutch wife. After escaping from her creator, she meets Kubo Shunsuke, who gives her a place to stay. Hilarity is bound to ensue as she battles her programming, which draws her towards him and pretty much any other man she comes across.
A detective and their partner should be a strong unit… What if your partner’s a sentient robot, though? Grey, a seasoned detective prone to cynicism, and his new partner Light Bulb, a database on metal legs, try to work it out from case to case…
It's a bird, it's a plane - no! It's a young, not-quite-human girl who wants to go to space, even if it means leaving behind her family.
A near future where the energy supply foundations have collapsed. Humans marked with the electric seal, known as Porters, are tasked with the transportation of energy cells. Trancers, electricity as their weapon, wield overwhelming combat ability, together with Chargers, carrying massive amounts of electric charge and providing charge to the Trancers, work in pairs to fulfil their duty.
Humor is the only defense against insanity in a world where the crime is so bad that the cops need armored tanks! Such is the world of Leona, ace tank-cop. In her pet tank, Bonaparte, she'll either save the city of Newport. . .or destroy it trying! In No More Noise, Leona recruits some help to catch some slippery crooks—help that's rather crooked itself! The villainous and sexy Puma sisters become duly deputized officers of the law in this latest chapter of Dominion!
Mei receives a present from her father to help her cope with her sudden heartbreak... a robot boyfriend!?
One day, a mysterious box arrived at Matsuda's door steps. The content of the box was none other than an android girl that insists that she's Matsuda's younger sister. Now, the purely otaku Matsuda has the privilege to live with a beautiful and submissive android sister that bows to his commands, or at least he wishes that were the case.