Ancient Sailor's manga / #lion(2)

People with the ability to turn into animals are called Monsters and monster children are kept apart from the rest of society. As a child, Riku lived with monster Tsukasa, but they were forced to separate. After 10 years, in order to fulfill a promise with Tsukasa and learn more about Monsters, Riku transfers into an academy for Monsters. Finally reunites with Tsukasa, Riku begins trying to change things for the better.

Lion Ouga and horse Toshimasa are childhood friends, but after Ouga got his first heat and was caught sleeping with Toshimasa's tutor, their relationship became estranged. Now, in high school together, Toshimasa is regularly reprimanding Ouga for his immoral behavior with the herbivore students. When Ouga is forced to go to a party at Toshimasa's house, Ouga teases Toshimasa by asking, if he'll become Ouga's partner to stop his usual behavior. To his surprise, Toshimasa agrees.