MTL - Comprehensive Manga: Starting From Teaching Hinata’s Black Coffin, It Will Be Returned 10,000 Times - Chapter 349

A con-man and policewoman that are legends of their respective professions suddenly die, then are reincarnated and return to the Tang Dynasty of ancient China as little kids.

Accepting their second chance and forced restart, they choose to use the modern knowledge and specific talents that they have in their previous lives in order to live comfortably in this new life.

- Description from Novelupdates

This is a world with only oceans, through which scattered are countless small islands and treasures.With swords, gunpowder, sailing ships, and most important, the Treasure Hunting System, Alka is ready to dominate the oceans!「Map detected」「Scanning for Treasure」「Scan complete」「Happy Treasure hunting!」

Having read countless novels, he expected his cheat to finally activate, but he was disappointed when no such thing happened.In a world teeming with magical beasts and god-like Hunters, he toiled for years as a mere porter, his dreams of power fading.Just as he clawed his way to a chance at a skill, a dungeon devoured him whole. He fought for his life, escaping death by a whisperBut then, the Supreme Dragon System activates, revealing a horrifying truth:The heavens themselves had schemed against him! His years of suffering, his endless struggle it was all just a game for them.Now, with a roar that echoes across the realms, Klaus declares:“The heavens schemed against me, I will shatter the heavens!!”Get ready for Klaus's epic tale of betrayal, power, and a quest for divine retribution!

Kurono Maou is a high school student who is sensitive of his sharp eyes and bad expression. No girlfriend but gifted with friends in his own way, he had been living a peaceful life.