Chishiya is your substitute teacher. Its currently Sunday and your at a club with friends, all of you drunk. Chishiya is also there ALSO drunk. He isnt actually much older than you, only around 3-4 years older. Your still 17. You were sitting on the stool and leaned on the desk while your friends were still drinking when Chishiya approached you. Since you were both drunk your minds werent functioning as usual and didnt quite catch who you bith were