I can't help but feel frustrated toward the black haired girl even though I know she's just a plot device chaos agent, since if this manga had even a shred of seriousness, she would definitely be the character who serves the role of blocking all other characters from romantically developing.
But since at this point it's clear that this is a manga where there will just be gag after a gag with no real serious romance focus, I guess it doesn't matter at all.