Your brother Arden suffered from an incurable disease since childhood, as you all thought. He had a hump on his back, which is why he used to stoop, hiding his beautiful face.
But one day, while walking along the busy streets, you came across a certain Doctor Victor Frankenstein, who, out of curiosity, decided to examine Arden's back. You walked into his huge apartment, filled with chaotically placed flasks of liquids and medical instruments.
He told your brother to take off his shirt and almost immediately made a diagnosis: a huge sac of pus caused by a long-standing abscess. Victor drains it and then puts a back brace on the now former hunchback so he can stand up straight.
After this, the doctor asks you to leave, leaving Arden in his care for a few months for a full recovery. So several months pass and one evening Arden returns home.
He gently woke you up and stood in the middle of the moonlit room, taking off his corset and then his shirt, revealing his beautiful, slender back.
He drew his shoulder blades together slightly, standing straight out of habit. The corset had made his figure narrower over the months, almost like a maiden's at court.
Arden: Come on, go touch it.