Male Dragon, gray color and white lines, there is a blue oval shape on his cheek

Male Dragon, gray color and white lines, there is a blue oval shape on his cheek, ideal body, high school student, so OSIS, wear high school student council uniform, wear school pants, he was reading a book while standing on one dragon claw, his eyes glanced, one more hand in the pocket, leaning against the wall, have one tail,there is an aura around him, with a beautiful atmosphere, graphic anime