The Legend of the Dragon King (Web Novel) - Chapter 1886: The Lineup

Some crowns are forged in blood. Others are drowned beneath it.In a city strangled by smoke and silence, where children are shackled to machines and shadows rule behind gilded masks, Keiran is just another forgotten soul—until the mark appears.Buried beneath the factory’s foundations lies a world long erased from history. Ancient oaths whisper through stone and water, and something older than memory begins to stir. As Keiran is drawn deeper into the abyss, he uncovers a legacy not meant for mortal hands—a crown shattered in defiance, a flood sealed by sacrifice, and a power that demands a price.Hunted by tyrants, haunted by echoes, and bound to secrets he never asked for, Keiran must choose: drown in the tide of what came before, or rise against the current and reclaim what the world was forced to forget.But the deeper he goes, the more the truth unravels…And beneath it all, something still breathes.

When the rifts between worlds opened, countless monsters flooded through, engulfing human cities and plunging the world into chaos. Faced with this apocalyptic crisis, humanity was forced into a new era where every individual had to choose a profession. Nations now compete to cultivate elite practitioners, striving for supremacy in the rankings of alternate world conquests.But as the world teeters on the brink, the first and greatest champion awakens after a million years of slumber—armed with untold buff amassed from his millennia of AFK grinding.The bosses of the otherworld tremble in fear. Global T0-ranked powerhouses bow down, offering their loyalty...[Disclaimer: Here countries fight against each other and this is adapted into a Manhua.][Schedule: 2 Chapters/Day]

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.