SSS Class Cloning Monarch: One Punch with my Job Classed Clones!

Ren was stuck in the tower and was the only one left in the Heroes' party to conquer the tower. With him being the strongest, to the point that he could one punch them, he killed the dungeon boss of the last floor. Exiting the tower, he saw that many changes have happened and it was 10 years that has passed by. With his new life, he immediately knew that there was an association composed of Heroes. This made him excited to the brim! His past life from the tower was over and a new life to the surface will begin, he will become a Hero! All monsters and villains will fear his name! — Description from novelcodex.org