Takasu Ayako can handle anything; duels with foreign powers and assassination attempts don’t faze her. But can she handle falling in love? Fellow students at the prestigious school for Beatrice users are shocked to hear that their "Angel of Death" Ayako, who has never even shown a smile before, has fallen in love at first sight with the diminutive freshman Yoshimura Mamoru. Mamoru must decide how to respond to the sudden confession of love, the resulting fascination of his fellow students, and the dangers of being near Ayako. Will his own powers ever measure up?
Fifteen-year-old Tsukune Aono is average in every way; he has no hobbies, less-than-stellar grades and he's even flunked his high school entrance exam. His parents have managed to enroll him in a school, but it's no ordinary school! Tsukune will be attending the Youkai Academy, a place where monsters learn how to co-exist with humans! As the werewolves, vampires, witches and other monsters are required to retain their human forms, Tsukune - the lone human - is able to avoid their bloodthirsty gazes. However, he quickly attracts the attention of a number of devilish beauties including the vampire Moka, a busty succubus and even a young witch! It seems Tsukune's average life isn't so average anymore!
In Both shows main heroine is a powerful being, able to easily destroy any enemies, that devotes herself to protecting main protagonist who is weak.
Also in both cases it's a romance between highly renowned lady and a commoner.
Kei Kusanagi is a shy teenage boy with no romantic experience whatsoever... until he finds out that his hot new teacher is actually an alien! In order to conceal her identity, the two are forced into a pretend marriage... but is it really a pretense, or are they actually falling in love?
Please Teacher and Mamoru-kun ni Megami no Shukufuku wo! are similar in the relationship between the two main characters. Both Mamoru and Kei are younger and somewhat "lesser" men (boys, in fact) who are coupled with older and more powerful women. Both series have ecchi comedy and frequently put their couples in awkward situations. Please Teacher has a bit more love story worked in, whereas Mamoru-kun has more action, but overall, the two have very similar feels, so if you liked one, you should check out the other.
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?
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!
In both Mamoru-kun and Midori Days, characters are forced together without knowing why; we are shown romance and the feeling of friendship, making you feel like you are there with the characters.
In the present, the Japanese government has been conducting experiments to genetically engineer a human: a girl named Rizel. The experiment was a success -- sort of. While healthy and cheerful, 12-year-old Rizel also ended up possessing the uncanny need for “love” to further her development, as well as tears which were in fact volitile explosives! When sadness can end up destroying a city block, what's a girl to do except... get married?! For Iwari Tomori, the young man chosen as the most appropriate partner for Rizel, life is about to change, for better or for worse!
In both Mamoru-un and Rizelmine, unexpected couples are formed in the middle of many rocky situations, but it seems like love always wins. Each is filled with action and comedy moments that are to die for.