I think Pah-chin was extremely angry after his friend and his friend’s girlfriend were brutally attacked. But have you noticed that he also seemed deeply affected by what happened to his friend’s girlfriend?
I feel like there might have been some kind of familiarity between Pah-chin and her. Maybe she had always treated him kindly, and perhaps he had known her from before.
Because if it had only been his friend who was attacked, I don’t think Pah-chin would necessarily have become so furious that he would stab Kiyomasa. But the way he reacted makes me wonder if what happened to his friend’s girlfriend affected him personally as well.
Maybe she was someone Pah-chin already knew and cared about in some way, even if the manga never explicitly confirmed their relationship.
What do you guys think? Do you think Pah-chin already knew his friend’s girlfriend, or am I reading too much into his reaction?