Corruption by Step Sister - Chapter 7. Horrible at everything

Ron finds himself reborn in the world of One Piece, stranded on a remote island in the East Blue. But he's not just any ordinary child—he’s bonded to a mysterious sign-in system that grants him powers with every new location he visits.At his first sign-in, he unlocks the legendary Sun Breathing Technique, along with a boost to his vitality. From Shitmotsuki Village to Skypiea, Enies Lobby to Marineford, Ron travels the world, collecting extraordinary rewards that make him a force to be reckoned with. The Raikiri, one of the 21 Great Grade Swords, Armament Haki, Observation Haki, and more fall into his hands.As Ron steps onto the battlefield of Marineford during the legendary Summit War, the mightiest warriors—Four Emperors and Marine Admirals alike—pause, stunned by his presence. But Ron merely waves them off, “Don’t mind me. I’m just passing through.”Join Ron on his journey across the Grand Line as he signs in at iconic locations, growing stronger with every step. This is not just an adventure—it’s a legend in the making.

“Let’s change the job’s contract.”“Sorry?”“Let’s switch it. From a work contract… to a marriage one.”Theo Kingsley doesn’t believe in soft edges. He’s spent years burying the version of himself that once felt too much, the kind and gentle side. His world is built on control, silence, and icy precision.Then comes Daisy Sinclair. The chaos.Former heiress. Newly broke. All pink, perfume, and polished nails. Once a pampered princess trying to piece her life together after her family’s downfall… a downfall Theo might’ve had something to do with.She shows up expecting a job.What she gets is a marriage contract.To Theo, marrying Daisy is a calculated move, a way to silence the side of himself he can’t afford to let out.To Daisy, it’s absolutely insane. But her credit cards are maxed, her options are few, and the Ice King is surprisingly… tolerable. Sometimes?Thrown into a world of cold suits and colder stares, Daisy's mission becomes simple: survive.But as sparks start flying and walls begin to crack, one thing becomes dangerously unclear:Is she melting the Ice King’s heart or just falling for a man who doesn’t know which version of himself is real?

Condition 1: One yellow scarf soldier rune is satisfied

Condition 2: Kill 100 rune monsters independently

Condition 3: 5,000 times of training to kill a pig with a knife is satisfied

Condition 4: 10 Spirit Talisman Pills are satisfied

Rune unlock upgrade.

Your source runes have been promoted from ordinary quality [Yellow Turban Soldiers] to premium quality [Yellow Turban Warriors]!

- Description from novelbuddy

[Congratulations! You are the Pioneer of the Mutation Abyss. Brace yourself - The Apocalypse begins now…][Main Quest: Eliminate Fellow Survivors][Description: The strong will thrive, and the weak will perish]Theo was never lucky. Bullied for his appearance and always underestimated, he lived his life as a pushover. But everything changed the night a meteorite struck him. His life takes a drastic turn.Chosen by the Mutation Abyss, he gains access to a mysterious system, granting him an evolutionary advantage.The world is doomed. An infection is spreading, turning the world into a deadly battleground. As the human Infectees mutate and portals to unknown realms open, otherworldly forces threaten humanity’s survival.Theo must harness his new abilities to survive in this brutal world. But in a place where strength is everything, will Theo keep his humanity, or become something worse?