Raising a Demon King: Starting a Future Diary

Carl keeps a crooked diary that updates automatically. [On December 28, I, who unfortunately became a prisoner of war, had close contact with the lord's daughter. [The other party showed slight resistance, but this feeling is the most wonderful to me. [Afterwards, I escaped the fate of becoming a slave. [Today's harvest: Earl Ashwood's favor and 9 silver coins. That day, Karl, who had regained his freedom, was full of doubts: Contact? That's called kidnapping! [On January 2, my magician friend whom I met for the first time invited me to the dense forest south of the city and met the mysterious goblin. [I gave this goblin my heart and soul, and it was so happy that it gave me a bottle of magic blood. [Afterwards, after taking the dragon's demonic blood, I successfully became a junior magic apprentice. [Today's harvest: a book on potions, an expensive second-hand wand, a torn and bloody robe, and 23 silver coins. Carl, who left the jungle alone, couldn't help but ask: Does the goblin refer to the human spirit on the ground? [... Month... Day, today's harvest: all the people of the demon clan...] ... A kingdom war launched on the pretext of encircling and suppressing the [Witch] under the instructions of the "god" completely changed Karl's fate. Overnight, the Lord's son became a prisoner of war. The worse news is that Karl discovered that he was the cause of the war, the [Witch]. In order to survive until the day when [Witch] becomes [Demon King], Carl must become stronger. First of all, start by getting rid of the fate of being a slave and becoming a magician...