Koisuru Fukurahagi

A young woman begins a relationship with a man who is already engaged to another woman, leading to a complicated love triangle. She is aware of his commitment but becomes emotionally involved regardless. The story explores the tension between their growing feelings and the existing engagement. The man's未婚妻 is also a central figure, though her perspective is not the focus. The narrative includes three additional chapters that expand on the characters' interactions and emotional struggles. The story does not provide clear resolutions, instead concentrating on the emotional dynamics between the three individuals.