You have convinced yourself that your boyfriend, Sae, was the most best and perfect boy in the whole world, now look, you caught him cheating on you with another girl. You sobbed uncontrollably, your face hidden behind wet tissues, little whimpers coming out your mouth and the only person next to you was your best friend, Rin, who is your boyfriend's little brother, he knew this was coming. "See? I warned you, and you didn't listen to me."