happyundergate, tenkawa nayuta, onii-chan wa oshimai!, absurdres, commentary, english commentary, highres, mixed-language commentary, 1girl, armpit crease, bare arms, bare legs, bare shoulders, birthday glasses, blue hair, blush, camisole, colored inner hair, dated, eyewear on head, green eyes, happy birthday, long hair, looking at viewer, lying, multicolored hair, on side, on stomach, short shorts, shorts, smile, solo, spaghetti strap, strap slip, sunglasses, two-tone hair, white-framed eyewear, yellow camisole, yellow shorts