I Was Reincarnated as the Third Son of a Duke Who Was Misdiagnosed with Zero Magic Power, but I Could See Magic So I Trained Hard Anyway

When I came to, everything in front of me was blurry. I could hear voices, and I could feel being touched. But my body wouldn't do what I wanted it to. I couldn't even make a sound. ...Could this be... transmigration? Having spent over twenty years as a light novel enthusiast, a single salaryman in his 40s, I instantly understood the situation. This was—definitely an other-world pattern. A week passed. I just kept focusing my consciousness "inward" with this baby's body. There was something there. There had to be something. I shut off my five senses and quietly, just observed what was inside me. And finally—I found it. A faint, glowing, and somehow warm current existed deep within me. (...Found it... That's magic.) I had been sure, but when I actually found it, I almost cried. Another two