1girl, 4koma, 3, arms_behind_back, bkub, cat, comic, greyscale, guitar, hair_ornament, hair_scrunchie, halftone, holding, holding_instrument, instrument, lying, monochrome, music, musical_note, neckerchief, notice_lines, on_back, on_ground, playing_instrument, poptepipic, popuko, sailor_collar, school_uniform, scrunchie, serafuku, shirt, short_hair, short_twintails, speech_bubble, talking, twintails, two_side_up