k-on!!, k-on series, kotobuki tsumugi, multiple girls, sakuragaoka high school uniform, hirasawa yui, tainaka ritsu, school uniform, brown hair, 3girls, blonde hair, short hair, long hair, hairband, couch, parody, akiyama mio, pantyhose, thighhighs, closed eyes, hair ornament, winter uniform, hairclip, skirt