President of the Student Council at the almost-all-boys Seika High School, the hard-as-nails Misaki Ayuzawa works every day to make life easier on the small population of co-eds who have enrolled there. Though an unholy terror to all things male during school hours, in order to provide for her impoverished family, she secretly works after school at a maid cafe in Akihabara. However, when campus hottie Usui Takumi wanders into the restaurant during her shift, suddenly she finds her reputation in school at his mercy...
Yukina isn't just a high school student, she's also secretly a popular novel writer. Due to her looks and personality, the girl doesn't have much of a social or love life and is avoided by everyone except her cousin Akira. So when the fans of her novels ask for Yukina to incorporate more love aspects into her stories, she decides to take immediate action – she'll force an unsuspecting student into a fake relationship with her to get more experience for her craft! The 'lucky' man is Kitami, a popular student who keeps a journal of all of the women he's convinced to confess to him. Holding the book above his head as blackmail, Yukina begins her experiments with Kitami – but others, such as Akira and an old friend of Kitami's will stand in her way...
Both are about a highschool girl unexperienced with love and the most popular guy in school that will help them experience it. The story starts at these manga with a secret that gets discovered and the other has to keep it. They have heartracing (especially Watashi ni xx Shinasai!) and funny moments that will make you fall in love with it. If you loved one, you'll definitely love the other one as well!
Okay, while Momoiro Heaven! Has more sexual themes to it, there are a few similarities to Maid Sama! that I think would make both works enjoyable to fans of either. The primary similarity between the two is that the female protagonist in both has a "secret life" where she works in order to support her familiy. Both of these girls end up getting caught by the blonde and super sexy male protagonists - who in turn vow to keep the ladies' alter identities secret. Both are laced with drama and comedy and feature female leads that are stronger than the average shoujo lead.
Yuuto Ayase is not interested in girls - if his two housemates are anything to go by, girls are loud, brazen slobs that are best left alone. However, when Yuuto accidentally discovers an important secret of his school’s most popular female, Haruka Nogizaka, the two become bound in a budding friendship. All too soon, Yuuto discovers that, despite her flawless appearance, Haruka is clumsy, naive, and a closet otaku... and he just might be falling for her.
The girls have a secret they do not want anyone else to know in Nogizaka Haruka no Himitsu and Maid-sama! Of course the heroes in the story find out and have to try and help the girls keep their secrets.
The main characters are a little different in personality, but contain characteristics that make them similar and interesting. Both heroine can kick ass but the main boy interest is still the strongeest. The stories are hillarious and are worth reading.
The setting is very similar. The girls are strong and a little bit manly. The guys are perverted and only have interest in that one girl, which they clearly show. The actions of Usui and Takumi were also very much alike. If you liked one, you'd probably like the other one as well.