[One scene in my heart, love suddenly started ...! ] Fuko Sasaki, a high school student, joined the Kendo club after a vivid encounter with her one-year senior, Tomonari Miyamoto. She raises her feelings for Tomonari. One day, her transfer student, Yanagiko Aihara, appears in front of her Fuko. She was a kendo club manager who was rumored to be Tomonari in middle school. Yanagiko's beautiful and ephemeral presence, who returned from her recuperation, afflicts her Fuko!