Itadakimasu, Ookami-san.

Even though I'm a wolf, it feels good to be eaten by a rabbit...! Natsuki, who stands out even among the dominant wolves, is traumatized by a heat he experienced to the point that he can never tell anyone about it. One day, while showing Hakuto, an inferior rabbit transfer student around school he was suddenly taken to an empty classroom. Natsuki tried to escape as Hakuto whispered, “I missed your pheromones...” Then suddenly Natsuki went into heat…?! (Source: Frontier Works, translated)