Ore, Yuusha Janai desu kara. VR Sekai no Chouten ni Kunrin Seshi Otoko. Tenseishi, Level 1 no Mushoku kara Restart Suru

The main character of this manga is the best player of the MMO VR game "Tempest." He completed the last dungeon by himself, being the first to accomplish this feat, but at the same time he reincarnated in the game he was playing minutes ago?! He, who knows everything about this game? He will be unrivaled from level 1! (Source: Bungeishunju, translated)