“Do people fall in love with someone on their first heat...?“ The world is filled with animals that can evolve into beastmen. There is a young and earnest wolf who was always mistaken for a showy person because of his flashy looks. The easily mistaken wolf has fallen for an attractive looking rabbit named Usami, whose skin is tanned. Even though Usami is very cautious of the carnivors, he will put his guard down only when he was with the easily mistaken wolf, who was a pervert that changed into a life saver for Usami. But what will happen to Usami on his first heat-!?