No relation to Tokyo Ghoul

Not just Brussel sprouts, spinach and broccoli. The boy did not like cake, ice cream, hamburgers, hot dogs or any other food little boys liked to eat. So the little boy decided that he was a very special little boy and that he should eat more sophisticated food. He went to fine restaurants and met great chefs, but he found that their food sat as uneasily in his stomach as did the food he had eaten before. He began to suspect that the chefs were feeding him garbage, that they themselves ate garbage, and called it delicious so as not to disappoint and anger those around them. And so they would continue serving garbage to each other, each one secretly believing he was the odd one out who could not enjoy the food. The boy did not stop to consider the implausibility of this scenario, so afraid was he that he was alone.

One day, when he had grown older, the young man walked by a cemetary and found a group of people devouring a rotting corpse. The boy smelled the meat of the corpse and became hungrier than he ever had been before, and joined them, and felt more satisfaction than he had ever known. He found that these people were ghasts and ghouls, and learned that he was a ghoul himself. 

The boy delighted in his new-found knowledge of his secret specialness. He played among the tombstones and mausoleums in the great cemetery where the ghouls and ghasts lived. He delighted in speaking for hours on the secret knowledge of the ghouls to his newfound friends. He was finally happy.

He soon found out however, that there were two factions amongst his friends. The ghouls believed that every human was secretly a ghoul, and that once they were able to spread the blessed knowledge of food to everyone, the world would finally be at peace. The ghasts, however, believed that they were the special ones. They believed that the world would be best if the ghouls and ghasts took charge, feeding on the rotted flesh of those too weak to survive. The ghasts also spoke, darkly, in whispers, of killing those too weak to live well but too strong to die on their own.

Never one to cause strife, the young man, who self-identified as a ghoul, made many friends on both sides. He decided that it was really all a matter of mild opinion differences, and the ghasts would come around to the truth once corrected on a few stray details eventually. Eventually however, the young man grew tired of the smallness of his social circle. He became sad when people ran from the ghasts in horror, or mocked the ghouls for their silliness and their consumption of rotting meat. But despite everything, every time he left the graveyard, he saw only ugliness and distastefulness in the world outside.

He sat down, and began to think how he could convince the world to raze the city to build a fabulous graveyard.

He thought for a very long time.

He is still thinking today.