SYNCROP aims to provides an opportunity to rethink, “What is seeing? How do we see? What do we see?” when we meet a person face-to-face. SYNCROP consists of a box tunnel, 2 dimming sheets, LEDs, and Electrocardiogram (ECG) grip sensors. Two pairs of ECG sensors are placed at the sides of the box openings, and heartbeats are collected from hands gripping the sensors. The sheets change from translucent to transparent, and LEDs turn on when heartbeats are detected. When participants look inside the box with their hands on the sensors, the mutual faces become visible when their heartbeats are synchronized. Heartbeat synchronization is induced by flashing rhythm of lights and the sheets that are correlated with the opponent’s heartbeats. They cannot see each other’s face until heartbeat synchronization happens. SYNCROP attempts to recontextualize face-to-face communication by using the nature of bodily synchronicity.