Maou-sama no Machizukuri! ~Saikyou no Danjon wa Kindai Toshi~ - Volume 2 Chapter 7

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

An Nuan thought that she was going to have her happy ending, marrying the love of her life when the man left her on their wedding day.“Pei Zhi Yi, the moment you step into the elevator, it's over between us.”An Nuan thought that she could stop her fiance from leaving, but that man still left for the other woman.The wedding hall was prepared and the guests had all arrived. With no groom beside her, An Nuan decided that she would marry anyone willing.“An Nuan, if you are willing, then how about considering me as your groom?”Unexpectedly, the young master of the Lin family, Lin Xiao Feng stepped forward to offer himself.An Nuan did not expect much from this marriage, especially when they both agreed that they were seeking to gain something through this marriage.Lin Xiao Feng needed someone as his wife in his political career. Meanwhile, she just needed to marry someone to get over Pei Zhi Yi. As someone who was disappointed by love, An Nuan no longer wanted to believe in love.She never thought that the marriage that she did not expect would turn out better than she had expected. Young Master Lin would pamper her and support her whenever she needed help.Wasn’t their marriage just for show?

He is the ruler of the mercenary realm, an overlord that gives headaches to the leaders of any country! For the sake of his friends, he’s willing to sacrifice himself; for the sake of his family, he does not hesitate to spill blood! He is a dragon, one that soars above even the highest of heavens. He’s a power that advances triumphantly through unstable situations, stirring up both the winds and the waters.

- Description from Novelupdates

Rowen transmigrates into the world of One Piece, gaining the Strongest Trait System—capable of plundering the Traits of others!Spotting the golden—shimmering Trait on Koby, Rowen scoffs—You think a clown like you deserves this? Gimme that!From then on—Rowen plunders even more powerful Traits.Marine Headquarters: “He is a monster who devours and takes everything—the most dangerous ability user in history!Engaging him is forbidden without explicit authorization from the highest levels of the World Government!The World's Most Dangerous Man! 'Sky Sovereign' Rowen!DEAD OR ALIVE! Bounty: 3,988,900,000 Beri!”