Hidamari de Kanojo wa Tamani Warau.

On the morning of his first day of high school, Iori Sakuma encountered a silver-haired, blue-eyed girl and a cat. The girl was bewildered by the approaching cat. "Do... Don't come over here, cat!" The girl noticed Iori's bewilderment at her unexpected outburst and left quickly. That was how he met Kaede Ryohara. Iori and Kaede ended up in the same class. As he watched Kaede, he noticed that she rarely showed any emotion. But when Iori happened to see Kaede smile, he felt his heart skip a beat... The curtain opens on a sweet but frustrating love story that will make a girl with few emotions smile. (Source: Dengeki Bunko, translated)