Create an image of a thin (both) 21-year-old anime boy and his 21

Create an image of a thin (both) 21-year-old anime boy and his 21-year-old sister taking a mirror selfie together. The boy, dressed in a modern plane (without text) black shirt, stands confidently beside his sister, who is wearing a black t-shirt (without text) with a playful and cheerful expression. They are both facing the mirror, with the sister 'holding' the 'phone' to capture the moment. The background is a stylish, well-lit room, reflecting their close sibling bond and the fun, relaxed atmosphere of the scene.