Rakudai Kenja no Gakuin Musou: Nidome no Tensei, S-Rank Cheat Majutsushi Boukenroku

In the Saga of Wind, Ephtal, a young guy who was once an ordinary human from the modern world, was reincarnated in a magical world. He decided to learn magic and spend his entire life mastering it. No matter how hard he trained, however, he lacked the talent to become a great mage. Filled with regrets, he died believing that his dream would never come true. 

Yet fate offered him another chance. He was reborn after 400 years with all of his memories and knowledge from his past life. He returns in an era where magic has greatly declined. The common spells are now considered as one of the most powerful ones, making his previous experience enough to place him above everyone. His journey from the weakest mage to the strongest begins once again.