Online forums (Reddit’s r/manga, MangaDex comments for -manga fushiou wa slow life o kibou shimasu chapter 4- ) have exploded with theories:
(also known as The Immortal King Wants to Live a Slow Life ) marks a significant transition point in the series as the protagonist, Sigmund, moves past his initial survival phase and begins actualizing his dream of a peaceful, self-sustained existence. Plot Summary: Establishing the Foundation -manga fushiou wa slow life o kibou shimasu chapter 4-
The village elders decide to evacuate. Leo offers to stay behind to "delay" the scouts. Milla insists on helping. Leo, for the first time, snaps. He grabs her wrist—gently, but firmly—and says: "If you follow me, you will die. And I will have to live with that for ten thousand years. Do not ask me to carry that again." Milla insists on helping
For the first three chapters, readers could almost believe Leo would succeed in hiding. Chapter 4 confirms that the past will always catch up. This raises the stakes from "wholesome retirement" to "desperate defense of found family." And I will have to live with that for ten thousand years