Trinity Seven, Charlotte Recommendations
Trinity Seven and Charlotte are shows about children with special powers. Both anime have a similar setting and the cast of characters have a lot in common (just think about the Sherlock sisters from Trinity and Yusa and Misa from Charlotte).
A Main Male Protagonist Has Insanely Powerful Powers, Arata from T7 is the Demon King and Yuu from Charlotte, and doesn't even realise how powerful they really are, AT ALL.
Both are surrounded by people they never knew, but now have come to love and share friendship with.
T7 is based on Mages (Strega) and actual magic, Where as in Charlotte it's more scientifically focused and doesn't involve magic.