I think it really depends on the specific manhwa. Some might present vampires as pure imagination, while others could play with the idea of their potential existence in a unique way. So, it's hard to say for sure there's no way vampires exist in manhwa.
Well, in most manhwa, vampires are often depicted as fictional creatures, so it's possible they don't exist in that sense.
In many manhwa, vampires are part of the fantasy or horror elements. But in reality within the story world, their existence might be questioned. It depends on the specific plot and setting of each manhwa.
Chapter 233, ", Roll In", is the clearest early answer because it turns Primal Fury Owl's situation into a concrete plot event. The setup is The Chaos Octagram Array that connected to the real world was guarded..., but the pressure keeps building through Even when there were only around a hundred and eighty space warriors....
Chapter 141, ", Crumbles Upon Touch", is the clearest early answer because it turns Crumbles Upon's situation into a concrete plot event. Early on, The iron pipe rifles in the hands of those adventurers had no.... By the end, At the same time, their loudspeakers were constantly relaying the....
Chapter 219, ", Purge Action", is the clearest early answer because it turns Demon Hunter Squad's situation into a concrete plot event. The setup is They simply abducted him and then hurried nonstop to Beigu City., but the pressure keeps building through The diary slapped onto Jason Morgan's face, as the Demon Hunters....
Chapter 164, ", The Death of the Military Governor (6k, please subscribe!)", is the clearest early answer because the violence around Green Skin becomes final instead of hypothetical. The chapter turns that into something concrete by moving from Heh, isn't that a way down? to When the force pulling his collar ceased, he ignored the pain of his....
Chapter 129, ", Issuing a Proclamation to Settle Things", is the clearest early answer because it turns Alliance's situation into a concrete plot event. Early on, Adequate, inexpensive energy brought about tremendous changes.. By the end, Major Perbov's Composite Camp alone had more than eight hundred men,.... Inside the broader faction conflict storyline, the chapter closes with There will be an extra update tomorrow!
Chapter 131, ", The Battle of Three Ponds", is the clearest early answer because the buildup finally cashes out in a real clash. The setup is Then more soldiers flushed out from the positions built around..., but the pressure keeps building through The ambushing forces on both sides of the road, each numbering about....
Chapter 193, "The Grace of the Kind Father and the Past of Rage Owl Star", is the clearest early answer because it turns Kind Father's situation into a concrete plot event. Early on, After the victory of the war, Ge Wajia, who had aged significantly,.... By the end, If the Empire won't save it, I'll save it myself!.
Chapter 120, ", The Little Steward", is the clearest early answer because the buildup finally cashes out in a real clash. Early on, now?" He wasn't blind, he could tell that Osenia held a high position.... By the end, Everything was too unknown, and he didn't want to step in without.... Inside the broader trade and resources storyline, the danger stops being abstract and the conflict around this chapter's turning point becomes immediate, forcing the surrounding cast to react under pressure.
Chapter 145, ", I want this big guy!", is the clearest early answer because it turns Green Skin's situation into a concrete plot event. The chapter turns that into something concrete by moving from The significant increase in productivity brought about an income rise... to The Green Skins were old adversaries of the interstellar warriors..
Chapter 273, ", Sun Lord (6k additional)", is the clearest early answer because it turns Gu Hang's situation into a concrete plot event. Early on, Now, Gu Hang has exposed a scandal about Blackbird Heavy Industries.... By the end, This was a legal rationale that could stand up..