When the ABO world comes, the last food you eat is the taste of your pheromones.
Someone: "Is the last bite of mushroom beef burger or Coke?"
When pheromones are leaked: Ahhhhhh, no, why do I smell so good? Can I have another mushroom beef burger?
Very likely short story, the plot should be taken on a plane
Intention: People are like iron rice and steel. If you don't eat one meal, you will be hungry.