MTL - After the Memory Loss, the Fishing Department O is Teasing Me Every Day - Chapter 19 suggest ambiguity

Growing up in a place where the rule of the jungle is law, the simple yet cunning Shaar is thrown into the chaotic world of war and political turbulence. After a chance meeting with a mysterious young girl, his destiny is forever changed as he embarks on a journey, joining the Byzantine army and climbing its ranks. With his bizarre beauty standards, will he ever return the affection of the girls that will follow him? Will he ever learn about his real parents? What lies ahead of him is a journey of strange humor and adventure.

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

The protagonist is an accidental time traveler - he didn't wait, didn't guess, only dreamed, but ended up in history, which he didn't pay much attention to. He was just lucky with his lineage.Ryo is a new member of the Nara clan, from the Uzumaki lineage on his father's side, and it so happened that he was born not at the beginning of the known plot, but more than three decades and two world wars later. Now he has to figure out how to get out of this situation however he can.

Zhang Xuan, one of the most shameless MCs in Webnovel history, enters the [Source World], a plane higher than the Firmament. With the complete Heaven’s Path Library that contains the abilities of Heavenly Flaws, Heavenly Order, and Heavenly Nature, he embarks on a journey to dominate the world.Seeking fate, recognizing fate, understanding fate, establishing fate… While you all are still refining fate, finding fate, and borrowing fate, I, Zhang Xuan, possess eternal destiny!(A novel full of face-slapping moments. Even if you haven’t read “Library of Heaven’s Path,” you can enjoy this without reading barriers.)