Isekai Maou to Shoukan Shoujo no Dorei Majutsu - Volume 12 Chapter 5 part4

She is the slow-witted idiot of the Prime Minister’s Residence. Everyone bullies her. He is the most respected and unfeeling Prince, with frightening ability and absolute envy! Together, they are conferred an imperial edict of marriage.

She acts stupid and tries to decline in every way possible while he despotically escorts her into the wedding…… everyone ridicules the match, but no one knows that the “idiot” has transformed from a loser into a talent.

After the marriage, when they encounter the Empress Dowager examining the room, they act in concert with each other and pretend to be two mandarin ducks deeply in love. Afterwards, she laughs, “The performance has ended. Your highness, please return.”

He laughs softly, “Since you’ve got onto this Prince’s bed, don’t even think of getting off.”

- Description from Novelupdates

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

Dr Dalton Wyatt, a world renowned Scientist and Inventor is transmigrated to the body of a high school student Dalton Wyatt who committed suicide due to unfortunate circumstances and complicated life.

“Tycoon Actor in Hollywood” unfolds the story of a failed actor from Earth who finds himself transmigrated into the body of a struggling young man in New York, USA, in a parallel world. Join us as we follow Lucas Knight's journey, step by step, as he ascends to stardom in the heart of Hollywood.---[This is a work of fiction. Any resemblance to actual persons, living or dead, or actual events is purely coincidental. While certain renowned figures may appear in this narrative, their portrayal is fictionalized and does not intend to represent their actual lives or actions.]