k0a, yuuka (blue archive), blue archive, absurdres, commentary, commentary request, highres, 1girl, alternate costume, black sports bra, blue eyes, blue hair, blush, border, bottle, breasts, cleavage, collarbone, fingernails, groin, half updo, holding, holding bottle, large breasts, long hair, looking at viewer, navel, open mouth, plastic bottle, ponytail, short ponytail, solo, sports bra, stomach, sweat, sweaty clothes, towel, towel around neck, upper body, very sweaty, water bottle, wet, white border, wiping sweat