An unserious, rich, egotistical black panther and a competitive, confident, honor student rabbit share a marked love between beasts with clashing instincts.

——My head is numb, my body is throbbing...—— Mashiro, a rabbit of good conduct and excellent grades, is the first herbivore student council president and is assigned to be the roommate and chaperone of the black panther troublemaker, Ryouga. Mashiro has overcome the handicap of being an herbivore with hard work, so Ryouga is precisely the type he hates most: a carnivore sitting on his talent. Even though Mashiro is treating him coldly, Ryouga still continues to talk to him for no reason. One day, Mashiro is hit with a sudden heat, and Ryouga marks him deep inside!