Lance N' Masques

Both animated series about children who are forced to live alone. They were not protected by anyone. In SukaSuka they are group of little girls, in LNM - one little girl. Young heroes, Willem in SukaSuka and Yotaro in LNM, decide that by all means will protect innocent children. 

In both anime world it combines elements of the medieval building, the elements of modernity and magic. Both series are devoted to the art of chivalry. The main male heroes defending their favorite girls and friends. 

If you like a "lolified" art which almost all character design in this series is cute or loli, you may give it a try. The differences is Ro-Kyu-Bu about basketball, Lance is about knighthood 

We have both protagonist who are generic losers who had their precious big metal thing lost and they are sad without it. Now they try their hardest to get back their precious big metal thingy. The male protagonist is also very similar to female loli protagonist in Lance N' Masques. They're short, kawaii ~ and has nice big round faces; making them the most likable/lovable characters you'll meet in anime history. 

Yotaro/Hayate must serve Makkio/Nagi. He is her bodyguard. Both Makio and Nagi are being targeted. A whole cast of characters come live with Makio/Nagi at her mansion. Both are a slice of life, comedy and some action.