Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10-nen ga Tattara Densetsu ni Natteita.

Sinopse

The Hero’s party was attacked by a large group of powerful devils. The party will no doubt be annihilated if this were to go on. <br> One member of the party, the strongest mage, Rakku, decided to stop the enemies in their tracks. <br> "Leave it to me here and go!" <br> "But……" <br> "Hey, I’ll catch up immediately, alright?" <br> Rakku mindlessly defeated the enemies, over and over again. <br> Using his special skill, Learning, Rakku learned the devils’ magic. <br> As he studied and utilised the devils’ abilities such as Drain Touch, he continued fighting, without rest nor sleep. <br> The devils got stronger and stronger, but Rakku too rapidly grew. <br> Rakku battled for 10 years, until no devils came at him. <br> Rakku returned to the capital, and was surprised. <br> His own name became the currency, and a gigantic statue of him, albeit fairly beautified, was made. <br> Due to him relentlessly absorbing the vitality of the devils, he had become young again. <br> An appearance unfitting of his age. Godly abilities. <br> "I stand out too much." <br> Rakku concealed his true identity, and decided to pretend being a novice adventurer. <br> Rakku, disguising as a F-rank warrior despite being an S-rank mage. His adventure in this now peaceful (?) world starts now!