The one thing that bothers me so much about Jirou’s quirk is that its based on headphone jacks, which is an extremely specific piece of technology to have a quirk based on. We’ve all seen her mom too, who also shares the same exact quirk with Jirou. My question is what came first? Jirou’s mom’s quirk or actual headphone jacks? Did headphone jacks even exist during Jirou’s mom’s time or were they invented later? And if so does that mean someone could have a technology based quirk before that actual piece of technology exists???