Dragon's Hunger Fruit is a mamono realm fruit described in Monster Girl Encyclopedia World Guide - Side I: Dragonia.
World Guide - Side I Book Entry
This Dragon Hunger Fruit I recommend to people of small stature who involuntarily shudder at the sight of very large amounts of dragon food. It is also called a mamono realm walnut, which can only be found in dragon graveyards filled with the magical power of dragon zombies. It has a hard shell covered with dragon-fang-like spikes, but its contents are surprisingly soft and have a sweet flavor like ripe fruit and can be easily put in your mouth. This fruit contains the "Greedy Magic Energy" of zombie dragons and even if you eat just a little, the feeling of hunger will quickly begin to dominate your body, causing the urge to eat more meat and fatty foods. Then, after you eat this fruit, the more culinary foods you eat, such as those that make up dragon food, the more the magic in your body will change to a feeling of fullness and fill you with happiness! The actual effectiveness is very high, and if you, being caught by the sensation of the sweet smell, take two more fruits in your mouth, when the food is finished, the magic power will not disappear and will continue to remain in your body, transforming into a "carnal desire"♥ However, for the relief of those men who have finished their lavish and generous meal, no doubt this "dragon hunger" will make them attractive to others - those who will no doubt come close to get their "human dessert"♥