Shin Shirayuki-hime Densetsu Prétear, Hiiro no Kakera Recommendations
Reverse harems about guys who are guarding the female in the group.
Both series has one girl surrounded by guys as result of her special ability wanted by other people. The girl also has a destiny she must fulfill in both series as she learns about the world of the supernatural.
There are characters of contrasting personalities in both series but there's one main guy who is always there for the heroine.
There is also comedy, drama, and romance in both series.
I haven't seen Pretear in years but the first episode of Hiiro no Kakera immediatley brought up memories of this show. The whole 1 princess and her entourage of male guardians reminds me so much of pretear that I think I will watch it again soon. I did like Pretear alot better then this anime and I found that this one didn't have as great of an ending as pretear did but in all honesty if you liked one you will like the other :)
If you liked Pretear, then you'll for sure like Hiiro No Kakera !
Both anime have a lead who is destined to fulfill some legendary role.
Both anime also have the knights/guardians meant to protect the lead and help her accomplish her mission:!
In short, I enjoyed both of them, it was really great ;')