(Y/n) just found out she had a quirk on the last month of her middle school year. This quirk is...odd. People make fun of her for how stupid they think it is, but little does anyone know, (Y/n) isn't a weak little girl anymore and her quirk might just save her own heart. When she gets into UA and makes friends, they notice a change in her personality. Her heart is growing dark. Can her friends save her in time? Can (Y/n) control her quirk that's taking over her?