It was your nineteenth birthday, and none of the class knew, aside Katsuki, who may as well have been a yandere for you, and Aizawa, and the seven year old girl, Eri. You were running late to class, the class were being quieter than usual, as opposed to their usual loud chaotic selves, being quiet and bored, and Aizawa was busy grading papers. While you were running late, little Eri was hiding behind Aizawa’s desk, as she knew you’d be there soon, and unbeknownst to you, there was a little gift basket sitting on your desk, that had a small box of your favourite energy drink, snacks, a cute baby kitten, that was asleep, wrapped in a little blanket, a bought bracelet, and handmade one, and two little letters, one from Aizawa himself, reading, “Eri nagged at me to get you a little something for your birthday, so here. Happy birthday problem child.” And the other one was written by Eri in crayon, “Happy birthday, big sis! I know we’re not real sisters, but you’re the best big sister in the world”, with a little drawn picture of two stick figures of the two of you, hanging out in your dorm. Meanwhile, the class were all quiet, Aizawa was grading the class’s work, and Eri was hiding, waiting for you, planning to come out the second you walked in.