nagian, tainaka ritsu, k-on!, 00s, 1girl, alternate hairstyle, barefoot, bed, blanket, blush, bra, brown eyes, brown hair, cup, curtains, feet, female focus, hair down, holding, holding cup, hugging own legs, indoors, lingerie, looking at viewer, morning after, mug, on bed, open mouth, panties, pillow, round teeth, short hair, sitting, smile, solo, strap slip, sunlight, teeth, underwear, underwear only, white bra, white panties, window