 If you liked
Love Hina
|
 ...then you might like
Maburaho
|
Harem focusing with a main character and his quest to meet the promised girl of his childhood.
The Harem Size may vary but it tells the same story (edit: actually it doesn't.)
I rewatched them to uodate this rec, Love Hina's promise girl plot is crucial but Maburaho doesn't really stress it out