I Implement Love and Justice in Another World

You've traveled through time and you still have a golden finger? Lynn, a senior law school student, died suddenly and woke up to find that he was the youngest son of a fallen knight in another world. So poor, so weak that no one can beat him, his only talent is called [Oath]—— If you make an oath, you will become stronger; if you break the oath, you will die suddenly. Sounds like a damn curse. But Lynn discovered that the "strong ones" in this world have a common weakness: they never take their words seriously. "You said you would let these villagers go as long as I survive three attacks, right?" "You swore as a knight that you would not harm innocent people, right?" "Do you want... To make a bet with me?" When everyone thought "love and justice" was a joke, Linn proved it with actions—— Those who do what they say are the strongest beings in this world. So, a slanderous law student, with his talent for taking oaths, began his journey of "justice" in this alien world where the jungle prevails. Border wars, royal capital conspiracies, ancient ruins, demon invasions, the coming of chaos... Many years later, when the whole world was operating under his laws, someone asked him: "Why did you make that oath in the first place?" Lin En smiled: "Because what I said must be done."