One morning, high schooler Inoda Nagi saves a kitten beastman from being bullied at the park, even though he loses the fight. Later, Mikejima Mao transfers into Nagi’s school, and he turns out to be the older brother of the kid Nagi saved. But instead of being grateful, Mikejima makes enemies of Nagi and everyone else in the class. Will these two ever stop fighting?

(Source: Houbunsha, translated)

Notes:
- Contains the extra "Kokou Kemono to Obaka Yankee: Shitto-hen" (孤高けものとおバカヤンキー 嫉妬編).
- Contains the one-shot "Kokou Kemono to Obaka Yankee: Dachi-hen" (孤高けものとおバカヤンキー ダチ編)