k-on!, kyoto animation, nakano azusa, hirasawa yui, tainaka ritsu, 4:3 aspect ratio, low resolution, animated, animated gif, screen capture, photoshop, nude filter, 3girls, beach, black hair, blinking, blush, brown hair, eyes closed, jumping, long hair, multiple girls, nude, one-piece swimsuit, o o, open mouth, pettanko, sex, short hair, surprised, swimsuit, twintails, umbrella, water, what, yuri, duplicate