If you liked the Fortune Arterial: Akai Yakusoku anime, the Anime-Planet community thinks you'd like:
When the students of class 2-A at the all-girls Mahora Academy head back to school, they are expecting a new year as usual. What they get is a new homeroom teacher... who's 10 years old! As if being a genius isn't enough, Negima is a mage. As part of his training to be a Magister Magi, he must succeed at teaching - without anyone finding out he's a magician! Can Negi keep his talents a secret from the girls who just adore the cutest new addition to their academy? Through demon attacks, magical enemies, and English tests, Negi will put all his talents to the test to be the best teacher he can and achieve his goal of Magister Magi.
If you liked Fortune Arterial then you may like Mahou Sensei Negima (and vice versa) because both feature young male leads as they try to adapt to new lives while they run into various oddities within the world. Though Fortune Arterial only really features vampires as the oddity of the world and Negima has a wide assortment of odd being with everything from robots, vampires, ghost, ninjas, and mages. The various cast of both series try to keep that which makes them unique a secret from not only their classmates but the world at large so that they can lead normal everyday lives.
Aside from being harem anime based off a visual novel, the story begins with a protagonist transferring to a new school. Eventually, he joins a club that acts as the center point where he will establish or build on his friendships, with the females in particular. The main heroines hold this club very dear to their hearts, and with the assistance of the selfless protagonist, their collaborative actions in the club better the lives of living beings. Romance also blossoms while working together.