About twice a year, Kokkaku goes through estrus, which makes his appearance and behaviour change.
His horns grow bigger, and orange markings appear. Usually, he's a Nice Boi™, but during this time, he's a lot more aggressive, especially towards other males. He's also got a mad NEED 2 BREED-

It lasts a little less than a week, and when it's over he feels awful. And also hella hungry, cuz he doesn't eat nearly as much as he usually does (and this boi loves to eat). Not a fun time for him :C

Kokkaku and art belong to me