happyundergate, oyama mahiro, onii-chan wa oshimai!, commentary, highres, 1girl, :o, armpits, bare arms, bare shoulders, blue background, blush, breasts, brown eyes, collarbone, grey hair, leaning forward, letterboxed, long hair, looking at viewer, multicolored hair, naked towel, open mouth, pink hair, reaching, reaching towards viewer, sidelocks, simple background, small breasts, solo, towel, two-tone hair