 If you liked
Ranma ½
|
 ...then you might like
Nisekoi
|
Both are rom-coms where a boy and a girl are forced to be a couple by their fathers. Though the boy and the girl hate each other at first, after a while, hate starts to change into love. Both series have also other girls who have crush on the boy. Also, while Ranma ½ is ecchi, Nisekoi isn't.
Both harem, many waifus and the main waifu is a grumpy one. Both are about a marriage promise. Main boy searching his waifu among waifus.