 If you liked
Maken-Ki!
|
 ...then you might like
Koi to Senkyo to Chocolate
|
Romance - Check
Jealous Childhood friend - Check
Good soundtrack - Check
Dissimilarities:
Maken-ki has Action and Ecchi as extra genre,
Koi to Senkyo to Chocolate is more into the romance and drama genre while Maken-ki is more into Ecchi and Action genre. Though both are quite good ^_^