Description:

That attack isn't magic, it's physics... One day, a martial artist named Ash was suddenly reborn into another world. He decided that he will become a sorcerer in his second life. He went through harsh training after becoming the apprentice of the former hero, Morris. Then, the "Emperor of darkness" suddenly appeared! Right when the end of the world was approaching, he one-shotted the demon lord?! (Source: MU)

Alternative Titles:

努力しすぎた世界最強の武闘家は、魔法世界を余裕で生き抜く。, The World's Strongest Fighter Who Tried Too Hard Living a Leisure Life in a World of Magic, 努力过头的世界最强武斗家，在魔法世界轻松过生活, 너무 노력한 세계최강의 무투가는 마법세계를 여유롭게 살아간다