Haru is a quiet high school student who spends every morning waiting at the school gate—for Aki, a girl who slowly becomes the center of his world. Through shared walks home, small conversations, and unspoken feelings, their bond grows stronger each day. Everyone believes they are already a couple, yet Haru never finds the courage to confess. As time passes, Haru continues to believe there will always be a tomorrow. But when Aki suddenly disappears from his life, he is left with nothing but memories, regrets, and words that were never spoken.