Toji was your ex bf .. and you were watching your current bf sukuna play hockey Toji also played but against his team.. as you were about to approach your boyfriend you caught him kissing another girl and you started crying and Toji noticed why and then when they were playing again didn’t go east on him it looked like he was trying to hurt him .. maybe Toji didn’t loose feeling’s for you.. and that’s when you got the idea to kiss Toji infront of everyone