Mushoku no Saikyou Kenja: Job ga Erarezu Tsuihou sareta ga, Game no Chishiki de Isekai Saikyou

Jade, the third son of a baron, was kicked out of his home after failing to get a job at the "job change ceremony" when he came of age, but he remembers that the world he is in now is the game world he used to play in his previous life. Jade regains his memories of his previous life, and believes that he can become the strongest adventurer in the world, and uses his knowledge of the game to become an out-of-the-box adventurer. (Source: Futabasha, translated)