From the Shadow of the Gods

Augustus was born as the illegitimate child of a famous family. Due to his brother’s organ failure, his family takes his organs, and eventually, his heart is also removed, leading to his death. However, he is revived by the call of an unknown figure and finds himself in an isekai(???) world. With no knowledge of what happened in the real world, Augustus must unravel the mysteries of his new environment to uncover the secrets of his past.