Arakure, Inu x Boku SS Recommendations
It blows my mind that these two are not in either of the recommendation lists.
They're both very similar in the fact that the male lead is assigned as a bodyguard for the female lead and was infatuated with the female lead since they first met. While inu x boku ss is a little bit more action based the romance is very similar. Both male leads are quite attached to the female leads and the female leads thought the male leads are a little crazy in the beginning.
They're very similar stories and if you like one then you'll love the other.