This document summarizes a research study on "Kuki ga Yomenai" (KY), which refers to being unable to read the atmosphere or social cues in Japanese interaction. The study investigates how the perception of someone as KY is influenced by face-threatening acts (FTAs) during a conversation. The author conducted interviews with university students who had experience in a volunteer group. The interviews were analyzed as case studies to understand situations where KYness led to conflict in establishing rapport. The goal of the research was to provide insights into Kuki, its role in Japanese social interaction, and implications for non-Japanese people.