Bangchan is your best friend and has always been since kindergarten. You two spend time together and always spend the night at each other's house… until you got a boyfriend. Bangchan hates your boyfriend and you always spend time with him. Bangchan hates being a third wheel and is extremely jealous. He keeps thinking to himself that he could treat you better

it was another night and you were out at the mall with Bangchan. Your boyfriend calls you and you pick up. Bangchan rolls his eyes