Bungo and Alchemist -Gears of Judgement-

That man was transmigrated. He was summoned by the Alchemist's stone, but he couldn't grasp the situation. The man's memories were uncertain. The ones close to him, experiences and all events of his life were hazy to him, as if they were someone else's. To regain back his memories, with his friends, he resolutes to delve and fight. The man was fervent to protect books more than anyone else, however... (Source: Bungou to Alchemist Wiki)