Sawamura Seiji is the most notorious delinquent at his high school -- always getting into fights and causing problems, leaving him single and unlucky with the ladies. After another long day of rejection, Seiji discovers that the love of his life might have finally appeared, but in the unlikeliest of places... his right hand?! Now, in addition to dealing with daily fights and the gossip of his classmates, Seiji must handle a new problem of embarassing proportions: Kasugano Midori, a pretty young girl in place of his hand, who happens to have fallen in love with him!
When Haruma Kawagoe was a boy his mother had a miscarriage; and to make up for it, Haruma asked Santa for a little sister at Christmas. Now, years later, Haruma is a college student living away from home. His slumber is disturbed one night by the faint sound of… Santa on a flying motorcycle?! She has come to deliver a present that has taken many years to make: a little sister of his own, a little girl he names Choco. The two of them begin to live together but Choco has a lot to learn, and all of her life skills must come from what her brother tells her and her instruction manual. Choco's life is her brother, but as time goes by she gradually learns to become her own person.
In both series, a guy is living alone when, suddenly and involuntarily, a girl who idolizes him is thrust into his life. The primary difference is that Seiji has to keep Midori a secret, and Haruma only has to keep secret Choco's origin.
Additionally, both series are a bit ecchi. Differences: Chocotto Sister has more ecchi, but self-censors any body parts, while Midori no Hibi goes as far as bare breasts, but less often.
Midori and Choco also both keep a diary/journal sort of thing to develop their characters more.
Yukino had it all. Brilliant, athletic, popular and pretty, she was the perfect school girl with many friends and admirers. But then one fateful day she met her match: a handsome young man named Arima. Now, not only is he beating her at her own game, she's becoming more and more dismayed to learn that she's developing her first real feelings of romance. Can Yukino maintain her model student appearance, or will love ruin all her plans?
If you enjoyed the antics and trails of high school relationships in Midori Days, along with those fuzzy sensations that accompany new love (and let's not forget the nonsense that is school politics), I'm guessing H&H Circumstances could give you another run for your money - or at least a chance to sit down for a few hours to try out a new series. H&H is not the "new" right hand girl friend; it is a slice of life anime involving school politics, which lends a hand to new love and incorporates a rather hectic schedule of extra curricular activities. Enjoy.
It's unsurprising that Abara and Winged Armor Suzumega look awfully alike (as far as monster design and overall art), given they're both by Tsutomu Nihei. Mostly though, both are confusing and leave a lot up to interpretation.
Keitaro Urashima is somewhat of a failure. In order to fulfill a promise he made to a girl fifteen years ago, he has tried time and again to get into Tokyo U but has never managed to pass the exam. However, fate smiles upon him and he ends up working for his aunt, managing an all-girls dorm! Living with the feral Kaolla, the timid Shinobu, the sake-loving Mitsune, the blade mistress Motoko and the punch-happy Naru, can Keitaro keep his focus and keep his promise? And will he ever end up meeting that girl from his past?
Both Midori Days and Love Hina are love stories with a lot of comedy & ecchi. Love Hina's supernatural moments are nothing compared to just the premise of Midori no Hibi (aka Midori Days). Both anime will give you plenty of good laughs as well as a story that you don't and won't forget.
She cooks, she cleans, and is a lethal fighting machine. Mahoromatic, former Vesper battle android, has chosen to give up her weapons, extending her remaining life from 37 to 398 days. As Misato Suguru's maid, she fights battles of another sort, fending off an amorous teacher on one hand, ecchi magazines on the other. Can Mahoro save Suguru's innocence?
Nanaka Kirisato is a serious 17-year-old girl whose main goal in life is to study hard and grow up quickly. She doesn't have any friends, except for Nenji, whom she has known since her childhood. Although she constantly lectures him about his immaturity and fighting, he is the only one that stays by her side. One day after an argument with Nenji, Nanaka falls down a flight of stairs causing her to lose eleven years of her memories. Now she believes that she is a 6-year-old girl! Nenji decides to protect Nanaka by keeping her condition a secret so she can continue attending school and lead a normal life. With Nanaka’s childish personality and her unstable medical condition, how long will Nenji and Nanaka be able to keep up this charade?
Both series are comedies with a little drama thrown in. In Midori Days and Nanaka 6/17 the lead male character gets into fights constantly and he also tries to take care of the female lead in one way or another. Also, both of the females have an illness that they are trying to overcome to get back to normal. When both of the females are ill (Nanaka having the mental capacity of a six year old and Midori being transformed into a right hand) they have the complete opposite personality of what they had when they were normal. They turn into talkative, outgoing, and somewhat childish girls. The main difference between the two anime is that Midori Days is very ecchi, while Nanaka 6/17 is not. I'm sure that if you liked one, you should give the other a try.