Contract Marriage: Emperor CEO's Secretary Wife - Chapter 1 - Secretary

Humanity was on the brink of destruction. Muyoung, an assassin from the Forest of Death, fell to his knees. There were corpses all around him. For years, he had worked for the Forest of Death and had finally been able to eradicate them. Now, he, himself, was about to die. He closed his eyes as he felt his heart stop beating.

Eternal battlefield descended, and the reality transformed into a hellish place for those who couldn't awaken a class and those who were lucky enough to awaken were known Awakeners.When living beings turned Eighteen they might awaken their class and gain the ability to wield mana at their fingertips. Awakeners would venture into the Eternal battlefield to fight for survival, gaining godlike strength in the process.Dawn reincarnated into this world, strangely while just a few days old, he successfully awakened the Superhero class as a result he was forced to venture into a dangerous world with an infant body.Thankfully for him he managed to unlock some unique skills which allowed him to survive and thrive.....[Ding! New Class Achievement unlocked][Grade - Epic, Gazing into the eyes of Death with a smile][Have a near brush with death 1,000 times in succession in a span of a few days. Young hero, Death had been chasing you but you have been faster][Your efforts have been awarded, young hero, and a new skill has been unlocked.][Nine Abyss Laser Eyes Level 1 - Launch a laser ray with temperature exceeding 1,000 degrees Celsius at your target.]

When he returned to the World of Martial Arts, the game was filled with blood and battles! Chen Kaixin had chased after the footsteps of the one emperor, two empresses, three princes, seven dukes, and thirteen aces for three years, but during the eve of the Sword Among Us tournament in Mount Hua, he was ambushed by evil bastards, and was killed so much that his level dropped to that of a newbie. He completely lost the chance to join the ranks of the powerful players in the game! In great disappointment, Kaixin quit the game and got drunk so that he could forget his sadness, but during that stormy night, Chen Kaixin found that he had actually dreamed for a total of three years, because when he woke up again, he woke up to three years ago, when he was still a student.

- Description from Novelupdates

The second prince has come of age. To celebrate the advent of such an occasion, the search for a suitable bride began. My younger sister was expected to go to the Royal Palace as a candidate. However, despite this, she eloped the day before her departure. I, the older sister she left behind, looked almost exactly like her – so much that we were often mistaken for twins…

One month, right? For just one month, shall I substitute in for my sister?