MTL - The Male Lead’s Substitute Wife - Chapter 17

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

Ding!{You've awakened the Echo System.}Scarlett Jerkins' dream was simple: wealth and the freedom to indulge. But when she let love in, she regretted it as her life was brutally cut short by her husband's family, ending a six-month coma but fate had other plans.Scarlett's eyes flickered open to an unfamiliar world, guided by an enigmatic system that revealed her new reality: an apocalypse world where monsters born from history deceased roamed free.She discovered that she was among the chosen members chosen by the system destined to save humanity. But this newfound purpose felt like a curse. Having escaped death only to face it again was a cruel twist of fate. And to make matters worse, her life was now tied to Garvin Johnson, her former rude, spoilt brat boss, whom she must protect at all costs.As she navigates this treacherous realm, she must confronts twisted creatures born from history's deceased. With the three elements at her command, she must gather resources, slay monsters, and safeguard Garvin.Scarlett's drive for survival becomes a quest for redemption, fueled by her past traumas and newfound purpose. As stakes escalate, Scarlett and Garvin face impossible choices, forging alliances with other chosen members who were handsome men and confronting enemies in a desperate bid to ensure humanity's survival.

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

There are countless parallel worlds beyond what we know. The people who first discovered this secret named it “Yan Fu”. Each world is a different fruit on a tree, and the person who shuttles through different fruits is called “Yanfu Walker”. Yanfu Walker is given different Heritage and trained to complete Yan Fu missions in exchange for rewards.In modern society, the Martial Arts sects have declined one after another, and martial arts prodigy Li Yan suffers from leukemia, making it difficult to survive by opening an audio and video store. One day, a person named MO appeared and took him into the Yan Fu world under the pretext of being able to cure a terminal illness. So “Hejian Skinny Tiger” Li Yan resolutely stepped into the world of Yan Fu, awakened the inheritance of Gu Huo Bird, and embarked on the path of survival in a different world. The truth of the world, Yan Fu’s goals, the secrets of the walking organization, and the ambitions of the rebel organization are far more than that…