kotobuki hajime, akiyama mio, hirasawa yui, kotobuki tsumugi, nakano azusa, tainaka ritsu, k-on!, eyebrows, 5girls, :o, armpits, ass, back, bandeau, bikini, black hair, blue eyes, blue hair, blush, breasts, brown hair, cleavage, collarbone, dimples of venus, embarrassed, flat chest, front-tie top, goggles, grabbing another's breast, groping, long hair, looking back, multiple girls, open mouth, ponytail, red eyes, short hair, side ponytail, smile, surprised, swimsuit, twintails, wading, water, yellow eyes, yuri