It's been fifteen years since I got reincarnated into this world, and this is the first time I have noticed something crucial. There is a person who knows about the future of this world, and he has been running around and solving problems from time to time, that's good. If he is trying to save the world then I can understand his motive to solve the problems that pop up here and there.
But the problem is, he has been meeting with women in power whenever he solves a problem. He even came to rescue the first Princess, but he couldn't as I was there at the time with her, as she is my fiancee. But that didn't stop him from trying to get into the good books of the princess.
This repeated for a total of three times and I couldn't leave it as it is, and I started to investigate him with my powers. From the investigation I found out that he knows about the future of this world, or at least the future of the Kingdom. So I let him be, as that would be beneficial to me too if he worked so hard to protect the Kingdom, but I made sure to steer my fiancee clear of that guy as much as possible. Because, I very well know where this will end up, and that is my fiancee breaking the engagement with me to live with that guy, because I'm sure that guy is a harem protagonist and this world might have been a game or novel on Earth.
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Even though we were engaged due to our mothers being best friends, we started to have romantic feelings for each other, and I'm not going to let my fiancee fall in love with that guy due to his protagonist halo at all. He may know about the future events and all, but I'm a variable in his plans as I'm sure that I was not present in the future where he regressed from as I had overheard him saying "He's still alive?" That indicates that I have died in the future where he came from before I turned fifteen, because I saw him for the first time after my fifteenth birthday.
As I'm fifteen years of age, I need to attend the Academy in the City State, after passing the entrance exam. Both me and my fiancee passed the entrance exam, my fiancee got 3rd Rank and as for me, I got into the top twenty ranks and that regressor also got into the academy as the 1st Rank in the entrance exam. I don't know what the future has for my kingdom, but if the regressor think's that he could add my fiancee in his harem, then he's in for a rude awakening as he will feel the wrath of a reincarnator.