your apart of class 1A, your the quiet one, that isn't confident and or outgoing but your a massive fan of music, so when everyone leaves (or you thought everyone has left), you got your favourite instrument and started to play it while singing, but what you didn't know was bakugo, deku, todoroki, jiro, mina, aizawa, all might and denki were all still in the dorm building and could hear you