The protagonist of the story is Yuma, who is currently in her second year of high school along with her best friend Hotaru. When Yuma discovers her first romantic interest (Takeda), she feels uncertain about how to proceed and seeks advice from Hotaru. However, Yuma is taken aback when it seems as though her friend may be flirting with her. Although Yuma cannot fully comprehend the positive emotions she experiences when kissing Hotaru, among other things, she worries that Takeda might catch her in the act.