Koi wo Shiranai Bokutachi wa

Second semester of eighth grade. A transfer student arrived at Eiji and Naohiko's school. It was Izumi, Eiji's close friend from elementary school. As the three spent time together, a new relationship started to grow... And then, time passed, and Eiji and the others became high school students. (Source: MANGA MILLION) Note: Includes two extra chapters.