sei (0724sei6), yuuka (blue archive), blue archive, absurdres, commentary, highres, 1girl, arm up, armpits, bare arms, bare shoulders, black halo, blurry, blurry background, blush, breasts, bucket, cleavage, closed mouth, grey sky, hair between eyes, hair bun, halo, hand in own hair, hand on own chest, large breasts, light particles, long hair, looking at viewer, mechanical halo, naked towel, onsen, outdoors, purple eyes, purple hair, red pupils, sideboob, sidelocks, sitting, sky, snow, solo, steam, thighs, towel, water, wet, wooden bucket