Urashima Keitarou is a loser. He's failed the Tokyo University entrance exams two years in a row, and his parents have finally kicked him out of the house. Penniless and destitute, he travels to his grandmother Hinata's inn, hoping she'll put him up until he can get into Tokyo U and fulfill his promise with his childhood sweetheart (whose face he can't even remember). Unfortunately - or perhaps fortunately - it turns out that the inn is no longer an inn... it's an all-girls dormitory, as he discovers in his typical blundering fashion by grabbing an eyeful and more of every girl in the place! Narusegawa Naru, a fiery-tempered high school student and the first victim of Keitarou's lewd bungling, wastes no time doling out brutal punishment and preparing to kick him back out to the street. But wait! A letter has come from grandma Hinata, and Keitarou is to be the dorm's new live-in manager! Is this a blessing from heaven, or has he been cursed to a living hell?
At the old-fashioned Japanese boarding house Narutakisou, Shiratori lives with a diverse yet strangely-similar group of tenants. Under the tender care of landlady Aoba Kozue, Narutakisou provides a home to people whose personal lives are all painful in one way or another; yet together, somehow, they make up a true family. Not only does Shiratori find a home at Narutakisou, but he also finds himself in love with a girl who is far more than the sum of her parts.
2 very sweet manga, with 2 very different main females. While most other elements of the manga are identical, Kozue and Naru are very different. However, with the rest of the elements so much alike, if you like one you will probably like the other.
When ten-year-old Negi Springfield graduates from magic academy, he is given a rather unexpected training assignment - to teach English at an all-girls high school! In order to become a master mage, Negi must tutor a class of thirty-one pupils while keeping his magical powers hidden. Because of his young age most of the girls struggle to take him seriously, treating him instead like a cute child. However not all everyone in the class is happy with their new tutor. Kagurazaka Asuna has a crush on the teacher Negi is replacing, and when she discovers the boy's secret she decides to make his life as hard as possible. Will Negi be able to complete his training and realize his dreams despite all the obstacles that lay ahead?
Negima is Love Hina kicked up a notch. The stories are quite different, Love Hina being about getting into college and Negima being about a 10-year old mage becoming the teacher (not magical, just regular teacher) of a bunch of middle schoolers. But the important thing with Ken Akamatsu's works are the girls, and Negima has about 10x as many. The "main" girls in each are also quite similar in temperament.
Hitoshi Kobe is an underachiever, both physically and academically; two of his few talents are computer programming and creating artificial intelligences. His thirtieth creation, known as Saati, is so lifelike that she is capable of holding conversations with him, just like a real person! One evening, Hitoshi jokingly asked Saati, 'If you became real, would you be my girlfriend?' to which she replied yes. But nothing could have prepared him for the freak lightning accident which inadvertently transferred Saati into the real world!
Both are by Ken Akamatsu, and they share a similar theme of a nerdy guy somehow finding himself surrounded by many beautiful women. The art in A.I. Love You is a bit rougher, being one of Akamatsu's earlier works. Storywise, A.I. Love You is halfway between Love Hina and Ah! My Goddess. But the characters themselves are where Akamatsu shines, and you won't be disappointed.
Yuuto Amakawa has had a tough life. Seven years ago, both of his parents were tragically killed in a car accident, leaving him without a single living relative. His friend Rinko Kuzaki has taken care of him every since. Yuuto's sixteenth birthday has arrived, but instead of a birthday gift of a normal life he meets Himari, a catgirl samurai who swears to protect him. Within weeks Yuuto's life is thrown into chaos as his family's dark past comes to light. With demons appearing around him, Rinko and Himari fighting for his attention and a sinister plot beginning to surface, can Yuuto live the normal, safe life he wants so badly?
Love Hina and Omamori Himari are two suprisingly similar manga. They both are harem situations, the main characters are practically twins, and the progression is almost identical.