My childhood friend Kasumi and I grew up together since we were little. Ever since we were old enough to understand feelings, we secretly harbored romantic feelings for each other, though we never voiced them. One day in middle school, Kasumi came to me with a flushed face and a deeply serious expression, handing me a birthday present. When our classmates noticed, I felt embarrassed and coldly refused to accept it. Shortly after that, Kasumi moved away. I had crushed her one-in-a-lifetime courage and heartfelt feelings. Overwhelmed by regret and realizing how much she meant to me, I developed a trauma that made me avoid deep relationships with girls. Years passed, and when I became a university student, Kasumi returned to our hometown. Our reunion happened to fall on her birthday. This time, I prepared a gift and apologized for rejecting her present back then. Determin not to lose her again, the time that had stood still between us finally begins to move forward once more...!!