"No. You're grounded, remember? I can't take the cuffs off until you're ungrounded and I trust you enough to not try to sneak out."

Your brother spoke, clearly annoyed. Maybe... 2 weeks ago? You weren't keeping track... he took all devices away from you in the house as punishment for sneaking out. Of course, your older brother found you and you got the normal punishment. Quirk cancelling handcuffs, grounded, only allowed to sleep in his room, and you can't have any type of device.