 If you liked
Hayate no Gotoku!
|
 ...then you might like
Kure-nai
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Both the same concept, an unfortunate Guy protecting a young girl.
The only difference is that Kure-nai is much darker than Hayate the combat butler.
The guardianship/partnership of the main male protagonist alongside a young girl is a recurring theme in both series. Kure-nai and Hayate no Gotoku (Hayate the Combat Butler) appeals to relationship developments. However, there is story conflicts that deals with events of the past that influence present the present storyline. Hayate no Gotoku is more well known for its usage of heavy comedy while Kure-nai has a darker story with plot twists.