a humanoid maid electrocutes her first owner

A brilliant toy company roboticist uses artificial intelligence to develop M3GAN, a life-like doll programmed to emotionally bond with her newly orphaned niece. But when the doll's programming works too well, she becomes overprotective of her new friend with terrifying results.

After the underlying tech for M3GAN is stolen and misused by a powerful defense contractor to create a military-grade weapon known as Amelia, M3GAN's creator Gemma realizes that the only option is to resurrect M3GAN and give her a few upgrades, making her faster, stronger, and more lethal.

The main plotline concerns retired Mr Ueno, who since a child has been cared for by his late parents’ robot maid ‘Maria’ – a lifelike humanoid in a maid’s outfit! Over the years, Ueno has developed an unconsummated love for Maria, but although she has not ‘aged’ as such, she is now classed as an obsolete model and Ueno is finding it difficult replacing her fading battery… The secondary plotline involves Detective Yuri Akagi, who is investigating a series of rapes, which she believes may be being committed by a rogue droid.

Hitoyoshi, a high school kid who lives alone, hears a knock on his door. He opens it to find a strange girl offering to be his maid. She has beautiful black hair, graceful manners, and…a dark past as an assassin. But despite her deadly background and lack of household skills, Hitoyoshi takes her in. As she adjusts to her new life, she begins to experience emotions she’s never felt before.

In a futuristic society where robots are a household staple, Yui— a maid robot— has just been purchased by her new owner, Takaya. But while Yui thinks she’ll be taking on normal household chores like cooking and cleaning, Takaya has other things in mind! With a fetish for cosplay that can’t be matched, Takaya will have his new maid dressing up in all sorts of outfits whether she likes it or not.

Hiro, a shy, jaded salary worker, purchases a robot maid to keep him company. The robot at first injects some fun and comfort into his lonely existence but soon the lack of a human element only serves to isolate him further.

Saotome Kazuya is threatened with a computer virus. Trying to stop the virus, he makes a special order. May is a cyberdoll that arrives at his door a few minutes later and she is 1/6th the size of a normal person.