Nineteen-year-old ronin Hideki Motosuwa desires two things more than anything else: a girlfriend, and an expensive humanoid computer (known as a 'persocom'). But with his dead-end job and no financial aid from his parents, owning a persocom seems impossible... until he finds a blond-haired female persocom tied up amongst a pile of trash! After getting her home and figuring out how to activate her, even the computer-illiterate Hideki realizes there is something unusual when it appears she can only say one word - Chii. Is she just broken, or is there more to this persocom than her behavior lets on?
Airi has always dreamed of marrying her fated true love and living a normal, happy life – a dream disrupted forever when Aram, a prince from another world, emerges from her grandmother’s mirror. She takes the young prince home with her thinking he is a lost child, giving him a home cooked meal and a place to sleep. However, in the morning she discovers that, as the result of a magic spell, Aram transforms into a 17-year-old boy whenever it’s dark, and her kiss is the only way to change him back! If that wasn’t enough, Aram is in hiding from his older brother, the evil sorcerer Jeile, who has fallen in love with Airi and intends to make her his bride! Will Airi ever be able to find her happily-ever-after?
Feared for his fighting prowess and his ‘Devil's Right Hand', Sawamura Seiji is one of the most well known delinquents in town. Though, behind his devil facade Seiji is merely a lonely seventeen-year-old boy who only wishes to have a steady girlfriend. Despite being rejected twenty times, Seiji gets his wish, but not in the way he thought or wanted; one morning he wakes up to find that his right hand has been replaced by a small girl! Seiji's new ‘right-hand girl' is Midori, who has loved Seiji from afar for three years; but unfortunately for her, Seiji wouldn't be caught dead dating his own hand and simply dismisses her attempts to profess her love. Now Seiji must struggle to maintain his fearsome reputation and keep Midori a secret, while she continues to hope that maybe one day her and Seiji can be a real couple.
The unique style of how the characters meet in Chobits and Midori Days is similar as is the strange love interest between the main characters. They both have a similar plot line dealing with some ecchi, although the relationship as a whole remains relatively innocent.
Maiku Kamishiro has always had a photo of himself as a child in front of an old house with a young girl. One day after spotting the building in a news report, the high school boy moves to the countryside to live in the house from the picture. While living alone, making ends meet by working as a freelance programmer, Maiku gets the shock of his life when not one, but two girls turn up on his doorstep claiming to be his twin sister! With the lively Miina and timid Karen both possessing the same photograph, the pair begins living with the confused Maiku as they try to figure out which one of them is actually his sister.
There is major ecchi with romance with lots of panty shots along the way in Onegai Twins and Chobits. The main girls seem to be very innocent and the two main guys also have very similar personalities to one another.
There is a forbidden love radiating through both of these anime series. Romeo X Juliet is along the line of a more historical sense between two warring families while Chobits presents a more technological dilemma between a robot with feelings and a human.