How will you describe Toru's teenage life?

In high school, Toru, his best friend Kizuki, and Kizuki's girlfriend Naoko are inseparable. Naoko and Kizuki have known each other their entire lives. Together, the three of them obtain a kind of balance centered around Kizuki, who runs most of the conversation. Kizuki is Toru's only real friend and the only link between Naoko and Toru. However, Kizuki's suicide throws Naoko and Toru into depression.