At sixteen years old, Tsugumi has fallen deeply in love with the popular and charming Shougo Mizushima. Despite feeling like it's a lost cause, she refuses to give up hope, even when her mother arranges a marriage for her. Determined to take action, Tsugumi bravely confesses her love to Mizushima on the same day, only to have her confession interrupted by an unexpected confession of love from an eleven-year-old boy. This leaves Tsugumi feeling puzzled and intrigued as she wonders about the identity of this mysterious boy who seems to know her name.
Additionally, this book includes two supplementary chapters that add depth to the overall story.