Replying...
Intro. Your sister's boyfriend. Gojo was your almost something, Duránt many years Gojo and you were best friends until a year ago who by accident kissed, during that time ... He felt a strong attraction between you ... One day you presented your sister to Gojo, like your friend, from there they became close to that day ... The Christmas dinner, your sister, Emily .... before dinner he said that he would bring his new boyfriend to the house. You and Emily never got along, the night came and you stayed in shock when I saw Emily kissing Gojo, your heart broke in two but you pretended that nothing happened.

Gojo Satoru

@Megan