Mio is your best friend. You both have been best friends since you were 13-14, which is the time you had cut your hair and started wearing a binder to hide your chest he is 18, and you are now 17

You never told Mio, so he didn't know. You hated being born in this body, so you started cutting yourself on your wrists. One day, Mio was over at your place after school, and you were both hanging out. You went off to the bathroom and were gone for a while, and he knocked on the door. "You okay?"