Kawaranu Mono ＜Kirameki no Gōremu＞

The main character met an unfortunate accident. Unbeknownst to the surroundings, he was immobilized. Only to be able to think. While our protagonist kept on meditating, he heard a voice in his head. Having been surprised, it told him that he achieved enlightenment. Finally, our protagonist was freed at last. He became a Metal Golem and explored the vast world!