Strongest Son-in-law: My Six Gangster Wives

*For his master's last wish he had to married into this family as son-in-law.
Ever though since he married into this family, he had been mocked and ridiculed by endless coldness. 
His only value in this family was to clean and cook for this family… 
"If you are not satisfied, you can get lost." 
Be treated like this,He gritted his teeth, struggling between reason and venting! 
But in the end, reason wins… 
In such status which he was not even comparable to a dog, he did not give up! 
Because he still was the man who always keep his promise.
In their eyes, he was just a trush. 
Until one day, The six mysterious beauties had come to see him and asked him to marry them… 
The Elder one, As the Commander who had Millions of troops. 
Second one, The top celebrity who had the The largest interpersonal relationship in the world. 
Third one, The richest woman in this world. 
Fourth one, The peerless doctor who could against the god of death. 
Fifth one, the genius of scientific research which the country treat her like Unique treasure. 
Last one, the top-notch assassin…