Definitely not. In the manga, there's no such plotline of Zenitsu and Nezuko getting married. Their relationship is more focused on being comrades in the fight against demons rather than a romantic one leading to marriage.
StarCraft was a real-time strategy game developed by Blizzard Entertainment and first released in 1998. The game was set in a fictional universe that contained three different species: humans, Zergs, and Star Elves.
The exploration and war of humans in the universe led to the conflict between the three races. The Zergs were a highly evolved lifeform that expanded their territory by infecting other planets. Star Elves are a type of life form with powerful magical abilities. They live in the depths of the Star Field and engage in mysterious exchanges with other races.
In the game, players needed to control a race to fight against other races on the strategy map in order to win. The main features of the game included multi-line operations, a rich variety of units, complex map design, and a variety of missions.
The background story of StarCraft was full of sci-fi elements and philosophical thinking. It depicted a complex and mysterious universe and also reflected the fear and challenges of mankind in the face of the unknown.
One common theme is friendship. Female characters often form deep friendships with Zenitsu, helping him grow and overcome his insecurities. Another theme is adventure. They go on demon - hunting adventures together. For example, in many fanfics, they explore new regions in search of powerful demons.