Who Designed This Underworld Dungeon? - Chapter 5 - : No Medication Allowed

Nexus found himself transmigrated into an isekai of magic, where he encountered a captivating Dual Cultivation System. Realizing the importance of this system for his progress, he embarked on a quest to seek out girls who would wholeheartedly participate in the practice of dual cultivation alongside him. Failure to find willing partners meant that his ability to upgrade and advance would be severely hindered.

Unfortunately, it appeared that the inhabitants of this magical isekai realm were oblivious to the concept of dual cultivation.

Thankfully, within this realm, there existed a race known as succubi. These non-human beings possessed the ability to nourish themselves through the consumption of men's semen. Regrettably, they were considered undesirable by humans. Yet, Nexus discovered that he was an exceptional match for these succubi, forming a natural bond that made them highly compatible partners.

Furthermore, Nexus encountered a stark contrast between the techniques described in the Xianxia novel he possessed and the actual magic present within the isekai realm. The disparity was substantial, requiring him to invest a considerable amount of time to acclimate himself to this unfamiliar form of magic.

With his newfound allies, Nexus set out to make a profound impact on this new world.

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When he came to his senses, Hirasawa Kazuki, a normal university student, found himself in possession of the body of a game’s character.

Moreover, it was Harold Stokes, the story’s most hated character who was even given the title 『King of trash』by the players. Myriads of landmines are just waiting for him to step on them, like death flags!

Will Harold be able to clear the survival route while avoiding the countless death flags in his way?!

—WSA 2025 ENTRY—The weakest loser they mocked for years wasn’t at all weak—he was a god in disguise, with the power to bring the world to its knees.“I want you to teach him humanity, so he who feels NOTHING but rage can at least learn morality”“And you trust a Demon to do that?”Seiya dreamed of becoming a hero, one of those legendary warriors everyone worships. But his Awakening failed, leaving him powerless and humiliated—a target for cruelty.Locked away and tormented by those he trusted, his suffering revealed the truth of his origin: he wasn’t just human.Unleashing powers that defy the laws of the world, such as his All-Seeing eyes—capable of negating time, absorbing skills used against him and granting him 360° vision.Seiya rises from the shadows, no longer a punching bag but a force that terrifies demons, monsters, and humans alike.Hero or villain? It doesn’t matter. He’s done obeying, done breaking for anyone.Now, they beg for mercy from the god they tried to crush. Seiya’s only question: should he grant it?Brace yourself for a journey of chaos, revenge, and the rise of an unstoppable power.Seiya doesn’t need your approval—he’s taking the world, one broken rule at a time.————————————————————Yes! He does turn to a cold villain and loses all emotion except rage but the process leading up to it might drag a little__stick around longer and you won’t regret it.Read the prologue next after this so you understand the world settings.