Namgung Se-ga, the warrior, was reincarnated in Romance

I was born as a collateral military officer of the Dae Namgung family and lived my entire life. When the Demonic Cult broke out and I ended my life in the Jeongma War, I was 45 years old. But when I opened my eyes, I had become the child of an unfamiliar Saekmok-in? “You begged me to let you use the Yeonmujang again this time.” “Yes. I’m now five years old, so it’s too late if I don’t start with the sword.” “What are you going to do with learning the sword?” “I’ll become a sword master.” “Sword, ahem. Yes… My son wants to become a sword master.” “It may seem like a long way off now, but when his body grows and his Ganhap matches, he will be able to show sword energy. Please allow me.” “Ganhap… Can you explain what it is, son?” “It means that your limbs grow longer, widening the gap between your swords to intercept your opponent.” “I see… If our son grows a little more, he will be able to easily pull out sword energy…” “Yes.” Cicadas eat pine needles, and silkworms eat mulberry leaves. And the unmanned must hold a sword. In my new world, I decided to learn and master the sword and become a strong man of the world, the Grand Sword Master. “Isn’t this Professor Casablanca’s liberal arts world history class? I heard the class content is the same as last year’s class.” “Yes, that’s right…” “I took notes diligently, use this.” A handsome face, good bloodline, and a gentle personality. No matter where I look, a child who can’t be missed keeps following me around. He takes notes for me, lends me a study room, and buys me food. I feel like he’s up to something. Is he trying to seduce me, who will become the best swordsman in the world, to become the emperor? Isn’t he acting too… , … too, cute for that…? A story of a martial artist who was reincarnated in a romance world and a suspiciously gentle prince’s chaotic academy life and a slowly immersive first love!