Buta Kizoku wa Mirai wo Kirihiraku you desu

The glory of the past is long gone. Once hailed as a prodigy, now mocked as the "Pig Noble" due to his arrogance and appearance, Herbert, the son of a ducal family, falls into despair upon receiving a letter through temporal magic from his future self, revealing a tragic fate twenty years ahead. However, determined to face the self he had long avoided, the "Pig Noble" resolves to struggle and use temporal magic to carve out a different future for himself!

(Source: Overlap, translated)