Lust System: Architect of Ruin
##"Warning: This story contains dark themes, psychological manipulation, and R-18 content. Not for the faint of heart."##
Twenty years of service. A lifetime of being the shield for those who called him "trash."
Kaito Kiryu was the FF-rank "failure" of the 109 summoned heroes. While the S-rankers basked in glory, Kaito spent two decades mastering the laws of matter and science to keep them alive. He was the backbone of the Hero Party—until the moment the Demon Lord fell.
At the peak of victory, the "friends" he protected turned their blades on him.
But that wasn't the end, regressed back to the past, to not only destroy those who betrayed him, but to protect those who loved him.
But at the face of old terror new terror shows up, constant death and rebirth... Until his 4th life, this time With the power to manipulate Space, time and matter and a System that rewards the subjection of his enemies, the Architect of Ruin has arrived, to ruin the empire that once shaped him.
Follow Kaito/Yasha's descent as he dismantles the empire that never made him rest.
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Chapter: Chapter 9: Uninvited Guests“Astonishing… truly astonishing,” Dr. Marvin said, his iron stethoscope resting lightly on Yasha's chest. His hands reached for his glasses, adjusting them as his eyes remained fixed on the young master.“Only a week ago, your mana vessels were on the verge of complete collapse. I would never have expected to see you live past this month.” His hands shook slightly as he withdrew his stethoscope.“But… but out of nowhere, your vessels seem to be stronger than before, almost like those of a seasoned Knight. If this persists further, then maybe you will finally be able to use mana properly.”Yasha sat calmly at the edge of his bed, loosely buttoning up his shirt. A faint smirk curled on his lips. He knew quite well that the effect of his Recovery Skill was no joke. He could already feel his weakened body steadily growing stronger as the clock ticked.“Young Master, leave it. I will do it,” Stella said, walking away from the window where she once stood. Her hands folded neatly over her ap
Last Updated: 2026-05-26
Chapter: Chapter 8: The Shadow GovernanceThe wet sound of Stella choking on his dick finally came to a sudden stop. The room became silent once more as Yasha's cum flowed deep into her throat, with his hands firmly pulling down on her head until the last drop was swallowed.[SYSTEM NOTIFICATION][COMBAT MODIFIER DEACTIVATED]Arousal state dropped to normal. Current power output reverted to 3%.Current Level: 3---The surging energy flowing through his veins slowly faded as his dick softened. His body slowly became frail once more, not completely weak like his initial awakening state, but visibly weaker compared to his arousal state.His body was structurally reinforced by his Instant Recovery skill, passively working every second.Stella slowly lifted her head, her lips glistening. She didn't look like the feared Silver Gold assassin she once was. Now she looked like a little hound waiting for her master's next command."Clean yourself up, Stella," Yasha commanded smoothly, reaching for a soft white cloth on his desk to wip
Last Updated: 2026-05-22
Chapter: Chapter 7: BloodlustName: Yasha ValemontRace: Demi-GodClass: Not AvailableAge: 19Level: 1 > 3[STATUS]Strength: S < EAgility: SS < EEndurance: A+ < DIntelligence: SPerception: SS < CCharm: B < DLuck: D < D-[NOTE]: Host is presently still weakened and only able to use 3% of original power in normal situations and 20% of original power when aroused. Completing quests and capturing slaves increases level and permanently reduces this weakness limitation."Damn, no wonder I felt extremely weak once more after that massive outburst of strength yesterday." Yasha thought, his hands scanning the glowing system interface floating in front of him."What's that, Master?" Stella questioned. She was kneeling between his thighs, her hands wrapped around his dick with her tongue slowly tracing around the tip. The cold-blooded look in her eyes was now absent, replaced completely by lust and adoration."It's nothing, just keep sucking." Yasha reached down, his fingers burying deep into the back of her hair as
Last Updated: 2026-05-22
Chapter: Chapter 6: Lust SystemThe door slowly creaked open, the room dark, with little moonlight slipping through the windows across the room.Stella stepped in, her steps controlled and silent. Her eyes fixed on the bed where Yasha lay motionless."Finally dead?" she whispered as she slowly approached the bed. Her voice was cold, holding no empathy.She reached for the bedside, her hands moving slowly across the silk sheets, tracing the edges of his body. She expected a cold, lifeless body, but instead Yasha's eyes snapped open sharply."You're late, Stella," Yasha said with a dark creepy smile. His eyes were clear, unlike those of a dying boy, nor was his expression like that of someone in pain.Immediately, a violet void quickly took over, and before Stella could reach for her concealed dagger, Yasha activated his active skill—Spatial Manipulation.Her body immediately froze along with the space around her, locking her mid-air like a fly caught in a web."Fuck!" she screamed, her composure already failing."Ooh
Last Updated: 2026-05-22
Chapter: Chapter 5: Life Continues> "Fuck! I died again. Doesn't this make it the second—no, third time already?"> "I didn't even get to cum."> "But her pussy sure was nice."[HEART RATE: 0. LIFE 3: TERMINATED.][ERROR... ERROR... CRITICAL FAILURE]> "What's this noise again?" Kaito's voice slowly faded in the void.[CONDITION NOT MET.][SYSTEM FAILED][SYSTEM REBOOTING][LOADING… LOADING…]"What's all this? Why do I keep hearing this same noise over and over every time I die? Anyways, what's happening now?"[SYSTEM ACTIVATION IN PROGRESS…][LUST SYSTEM ACTIVATED][RESTRICTIONS APPLIED: LEVEL INSUFFICIENT][REBOOTING... LIFE 4 INITIATED]"...Please don't die again this time." A soft voice, gone as quickly as it came.> "What's happening again? What do you mean by fourth life? Can't I die in peace?"---"Young Master... Young Master, please wake up. It's time to take your medicine."Young Master? Yasha's eyes snapped open.The ceiling wasn't the damp stone of the lab he was used to, nor the strong smell of blood from
Last Updated: 2026-05-22
Chapter: Chapter 4: What a fucked up life"Hey, FF-RANK. Commander is calling you. Move quick.""Loser, I'm speaking to you!" She lunged at his feet to trip him, but he moved on pure impulse. He dodged instantly, throwing back a cold stare filled with enough bloodlust to make her flinch."Whatever, loser. Just move quickly. Fuck!" she spat, turning away.Kaito placed his hands in his pockets, moving slowly toward the command tent, his mind racing.> "What is this? Wasn't I dead a few seconds ago? Why am I here?"His brain wandered, trying to grasp the reality around him.> "Is this some kind of illusion technique, or what?"Before realizing it, he was already at the tent, opening it to reveal people who controlled not only strength but armies as well.The Commander of the Empire Army, the Saintess with Yuna standing behind her, the leader of the Blood Dagger Guild—the top assassin guild in the Empire—Mordecai Thorne, and the Mercenary King, Varkas Krell.All these people were among the strongest on the continent. Especially t
Last Updated: 2026-05-22
