Koharun Run

Luke is reincarnated as a minor villain prince from a game he played in his previous life—a character destined to die before the main story even begins. In this world, he has an adorable younger sister named Diana, whom he cherishes above all else. However, Luke knows a terrible secret: Diana is fated to fall into darkness and ultimately die. His beloved sister ending up corrupted and dead? There’s no way he’ll allow that scenario to happen! Determined to defy fate, Luke begins training relentlessly from the time he is a baby. By pushing the supposedly weakest magic, “Dark Blade,” to its absolute limits through overwhelming effort, he gradually turns it into a monstrously overpowered ability. This is the story of a mob prince striving to become the strongest in order to protect the sister he loves most.

Cal was born as the second son of the prestigious dragon slayer Duke of Valm. He was born with great magical power, but the Holy Dragon King, fearing his power, cursed him, sealing him from casting spells. However, in order to overcome the curse, Cal taught himself to master the lost "Chantless Magic." On his 14th birthday, Cal told his father about it, but he was not believed and instead banished to a deserted island as a useless liar. By chance, Cal was picked up by the Dark Dragon King Altina, who was hiding on the island, and he realized that with "Chantless Magic" he could use "Dragon Magic" that humans cannot pronounce, and so he began his path to becoming the strongest.