Are Korean Miracle mu and Miracle MU developed by the same company?

They are all developed by South Korea, and they are the agents of Nine Cities in China. It's a pity that such a good game was ruined by the9 cities! Now the9 are developing MU prequel independently, and you can go and have a look if you are interested!

I miss the shameless pleasure of training with a trumpet at that time and killing quickly when I dropped my jewels!