A Sign of Affection

College student Yuki Itose is dealing with the ordinary pressures of campus life when she runs into difficulty during a train ride. An upperclassman named Itsuomi Nagi steps in to help her, creating an encounter that soon becomes increasingly important to Yuki.

As the two spend more time together, Itsuomi introduces Yuki to experiences and perspectives that feel new to her. Her interest gradually develops into romantic feelings, beginning a relationship shaped by curiosity, connection, and the wider world that starts opening up through their meeting.