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XZ is Hades, the head of 5 mafia families, the king of underground.

He was content with his life, when one day, WYB, the second prince of the kingdom, barged into his life unexpectedly like a hurricane, and making him...feel something.

But then he's gone, as sudden as his arrival.

There's something more sinister happening right before his eyes, and he will need all the help he can get, including from the elusive prince.

And WYB was drinking vinegar because he thought XZ loved his brother more.

Or
WYB being a gremlin he is, putting himself on XZ's bed, naked and ready to be devoured.