Sakamoto Days Chapter 172 Summary
Chapter 172 focuses on intelligence gathering. Lu and Shin travel to a former Order satellite station hidden in Iceland to extract records about Project Echo Root. Inside, they encounter AI defenses that replay their worst memories as deterrents. Shin breaks through by focusing on present bonds rather than past regrets. They retrieve a map of dormant psychic relay towers scattered across continents. Meanwhile, Echo Fang is revealed preparing to activate these towers using a new version of Protocol Zero designed for passive influence. Chapter 172 blends tech and trauma, revealing that the enemy is no longer aiming to control thoughts directly—but to alter the emotional landscape of humanity slowly. The team now knows where to strike, but not how long they have left.