Tensei Kenja no Isekai Life: Dai-2 no Shokugyou wo Ete, Sekai Saikyou ni Narimashita

Yuuji Sano had worked himself to death in a hostile corporate environment and was rewarded with a second chance when he transmigrated to a game-like fantasy world. He was given the title of a Monster Tamer, the weakest rank of adventurer, and with the help of the slimes he tamed, he acquired magical powers and became a Sage.

Although he had gained overwhelming strength, Yuuji was still haunted by his past and unable to go all out. But soon, unforeseen dangers began to threaten his new home and he was forced to show his true potential in order to save it.