sin rg, koguma (super cub), super cub, absurdres, commentary, highres, 1girl, alternate hairstyle, bespectacled, birthday, black eyes, black hair, black skirt, character name, closed mouth, dated, dress shirt, glasses, hair tie, hand on own face, happy birthday, honda super cub, looking at viewer, low twintails, necktie, pleated skirt, red-framed eyewear, red necktie, semi-rimless eyewear, shirt, short hair, short sleeves, short twintails, skirt, smile, solo, standing, text background, twintails, watch, white shirt, wing collar, wristwatch