Love Pistols, Vol. 3 (Yaoi Manga)

Shima Tokashiki is a Mongoose, so it would be totally natural for him to hate the Viper, Dr. Aogiri. Yet they’ve known each other since high school, despite their parents’ disapproval. When Aogiri transfers to the hospital where Shima works, they quickly end up as roommates as well as friends with benefits. And despite his natural animosity towards snakes, Shima can’t help wishing for something more from this hot doctor.