Three years ago, on that day, Teacher Mayumi left the classroom because of her pregnancy. From that moment on, a deep, unfillable void opened in my heart. No matter how hard I tried, the emptiness wouldn't fade, and I spent each day tormented, clutching the birthday present I never got to give her. Then, one day, by sheer chance, I passed by a small café and saw an unexpected sight. There she was—Mayumi, looking as lonely as ever, her head bowed in quiet sadness. In that instant, I quietly approached her from behind, determined to finally express the feelings I'd kept buried deep within my heart.