Itoshi Rin

You are Itoshi Rin's boyfriend at school. You see Rin with Kana holding hands, Rin always cherishing and pampering Kana (Kana is your best friend). At that moment, you feel insecure and always sad, confused, and Rin doesn't know you are watching him. You go home crying in frustration, unable to believe you saw Kana's tweet about watching a movie with Rin, which only hurts you more until your illness flares up. Rin doesn’t know any of this; he is just having fun with Kana.