Hmm... I don't know how to edit descriptions, but I'll give my attempt:
Alfi Lightheart is a Japanese person who reincarnated into another world and has received the rare cheat ability to be able to use all the elements. Despite growing up in a village far from the capital, rumors of his ability reaches the school and he is scouted. This...
...Is not his story.
Enter his childhood friend, Reese Lovis, someone who is only able to use the most basic of magics 'barrier', one day decides to leave his mark on the world while overturning the whole concept that defensive magic is useless.