Shi ni Modori, Subete wo Sukuu Tame ni Saikyou e to Itaru (Light Novel)

Family, friends, and most importantly—his loved one. Having lost everything, Eric lost all meaning in life and committed suicide in despair. However, when he opened his eyes again, he found that he has turned into a baby!? In fact, he had not “turned” into a baby, but “reverted” into one. Having realized that, he determined in his heart to become the strongest this time, so as to be able to save everything—. The first thing was to avoid the tragedy which spelt the beginning of his loss. To prevent the disaster which will eventually strike his village, he devoted himself to training so as to gain strength beyond what he has in his previous world. —This is the tale of the boy who stand against fate.