happyundergate, oyama mahiro, onii-chan wa oshimai!, commentary, highres, 1girl, alternate costume, black jacket, black skirt, brown eyes, clothes writing, collarbone, colored inner hair, grey hair, hand to own mouth, jacket, light blush, long hair, long sleeves, looking to the side, luck and pluck, midriff peek, multicolored hair, nail polish, open clothes, open jacket, open mouth, orange background, orange nails, pink hair, shirt, simple background, skirt, solo, two-tone hair, upper body, white shirt