Tokimeki Memorial: Only Love, Rosario to Vampire Recommendations
They share the school environment and the easy atmosphere. Both also have the same kind of stupid situations involving weird pranks by certain character types. While the school in Tokimeki isn't as strange as the one in Rosario they're both pretty odd and have their specialities. Plus, of course, all the desirable girls fall for the main character.
Both main male protagonist have almost the same personality, also a transfer student. The story was very interesting.