Do we meet again? Or part ways?

body ripped apart. In a blink of an eye, a ball of black mist trailing a long tail and wearing the upper half of this human skin flew towards us!!Almost at the same time, my brother quickly reversed....just because they see a stranger!I'm holding a water cup in my hand! The string of the cup is looped around my wrist, and it swings when I raise my hand.I don't know if the other party thought I was a...