Lohan, a transmigrated consciousness from a paralyzed body, wakes into a dystopian reality and the debt-ridden existence of the original Lohan, who chose suicide after being assigned a "useless" Mythical Slime race in the VRMMORPG Elysium. Despite the grim circumstances, Lohan's new body, capable of movement, fills him with an unshakeable resolve to survive and thrive. He enters Elysium, discovering the unique "Biomass" system and "Organic Evolution" path of his Devourer class, a stark contrast to the standard MMORPG skill trees. His initial attempts at absorbing grass are slow, but the discovery of "Efficient Digestion" and "Viscous Flow" reveals the exponential growth potential of his unique build. The first major turning point arrives when a ravenous larva attacks, forcing Lohan to instinctively develop "Hemolymphatic Tissue" for combat absorption. This brutal encounter, though terrifying, yields significant biomass and a new skill, confirming that consuming other creatures is the fastest path to power. He learns to prioritize survival and strategic evolution, investing in speed and defense before returning to the monotonous grind of grass digestion. The early game, initially perceived as slow and tedious by the original owner, becomes a thrilling, high-stakes incremental journey for Lohan, laying the foundation for his future dominance and hinting at the vast, unexplored potential of his mythical race.

As Lohan's in-game progress accelerates, he begins to experience subtle yet profound physical changes in his real-world body. Improved digestion, enhanced agility, and a clearer mind manifest, blurring the lines between virtual and reality. He observes the stark social stratification in his college, where students from the "Upper Zone" exude an aura of privilege, while "Lower Zone" students like him endure disdain and economic hardship. A shocking discovery reveals that other Elysium players also emit "biomass signatures" in the real world, with the intensity correlating to their in-game rarity and power. Isabella Vance, a powerful heiress with an Epic race, emanates a particularly strong signature, confirming Lohan's theory. His first direct interaction with Aeliana, a kind-hearted Elf girl, proves pivotal. She, intrigued by his intelligence, shares valuable Mana Stones. The first Mana Stone unlocks Lohan's "Magic Core" and the "Ice Spike" skill, a game-changer that allows him to defeat a Goblin, a creature far more dangerous than anything he'd faced before. This period solidifies the tangible link between his virtual and real existences, providing both hope for his physical body and a new understanding of the world's hidden power dynamics.

Lohan's burgeoning power attracts the attention of Lisa, a cunning fox-like player and a powerful heiress in the real world. Lisa, having observed Lohan's unique abilities, orchestrates a "test" by luring a Goblin to him, confirming his combat prowess. Her subsequent offer of a Vice President role in her guild, though initially met with Lohan's skepticism due to his past experiences with the elite, highlights his immense, yet unrecognized, potential. Their alliance forms, driven by mutual benefit: Lisa provides strategic insight and access, while Lohan offers unparalleled growth and combat versatility. Their first mission together, hunting Shadow Serpents in a dangerous crevice, showcases their synergistic combat style and Lohan's "Digestive Filter" skill, which allows them to efficiently extract valuable materials. However, a treacherous encounter with the frog elder Gribbit, who attempts to ambush them, serves as a harsh lesson in trust and the brutal realities of the game world. This betrayal reinforces Lohan's cautious nature and solidifies his resolve to rely on his own growing strength and the loyalty of his newfound ally.

The alliance between Lohan and Lisa solidifies, propelling them towards more dangerous ventures. Their journey takes them to Thalendor, a breathtaking elven city, where they meet Aeliana's master, Yrneha, a powerful elven mage who recognizes Lohan's unique qualities. They secure a lucrative contract with Intervar for Shadow Serpent acid, providing a stable income stream to address Lohan's real-world debts. The duo then embarks on their first dungeon dive into a colossal fossilized tree, a habitat for formidable Level 10 Glass Beetles. Here, they encounter Elle, a timid fairy, who seeks their help, revealing a deeper narrative within the dungeon. Lohan's evolving skills, including "Spatial Echo-Location," prove crucial in navigating the dungeon's complex layout and anticipating enemy movements. The battles are intense, pushing their limits and forcing them to rely on intricate teamwork. Lohan's ability to digest monster brains unlocks "Memory Resonance," hinting at the potential to extract knowledge and instincts from absorbed creatures. This phase marks a significant escalation in their challenges, transforming their individual quest for power into a collective endeavor with broader implications for the game world and their burgeoning guild.