I Was Reincarnated as a Brilliant Genius of a Prestigious Lineage

Story:

His talent was forged on the battlefield, but before he could fully develop it, he died. However, when he opened his eyes again, he realized he had been reborn as Dane Sogres, the youngest son of a prestigious count. The talent he now possessed… was not limited to just one field?! A talent in spearmanship, assassination, magic, summoning, and even swordsmanship—which he had not been able to develop fully before! He can finally nurture his endless talent in the embrace of the happy family he had always longed for. "Spearmanship! Dane must absolutely learn spearmanship!" "Are you saying that because you really don't know how useful learning stealth and assassination skills could be?" "Magic is the future, Father, Mother!" "For my younger brother… summoning would also be really nice…" …Mm, this is a happy family, right?