Substories are optional missions that appear as exclamation marks on your mini-map. They often involve helping citizens in distress, investigating strange occurrences, or participating in unique challenges. Completing substories typically rewards you with experience points, money, and sometimes unique items or weapons. Some substories are multi-part and require you to return to the same NPC later. It's highly recommended to complete as many substories as possible, as they are a great source of character progression and often provide humorous or poignant insights into the lives of Kamurocho's residents during the apocalypse. Always check your mini-map for new substory markers when entering a new area or after completing a main story chapter.
