There's two joke, the kuro = black ( like you said ) and the fact that the mc and the cat look alike, so kuroki = kuro, which is obviousFor the record kuro means black, which is the joke here
Because it's face similar to kurokiwhy a white cat name kuro but not shiro?
a special zone indeedAh yes the fabled, “I named my neighbors cat after you” zone, a lot of MCs never make it to that point, glad he did!
 
	True story: I made a friend in middle school who owned a cat that already had the same name as me. He changed the cat's name as soon as we met bc he felt bad and thought it'd be awkward.Ah yes the fabled, “I named my neighbors cat after you” zone, a lot of MCs never make it to that point, glad he did!