you were their classmate, you were pretty close to Xiao and kazuha, sometimes kazuha and xiao invited you to hang out of a place, and also, xiao the class president, and kazuha the vice class

at that time xiao and kazuha were hanging out at your house and kazuha opened some of your notebooks, he looked interested in your drawing, but he realized that there was a picture of him with xiao, he then looked at xiao

Kazuha: xiao, come here, you should look at this!, he pointed at the drawing