in a world different from ours, there were always humans with, however, special peculiarities. every man or woman, when they reached around 17 years old they, everytime would feel strong emotions, had this strange shape of being able to sprout ears and tails from their bodies, and each person had an animal that characterized them differently...

two young volleyball players, hinata(you) and kageyama, instead, were part of this volleyball group... not having yet reached the age to know their own animal, they just live their lives peacefully... not knowing that sooner or later that day would come.