2girls, arm_rest, black_shorts, camisole, chair, collarbone, commentary, highres, holding, holding_paper, holding_pencil, instrument, looking_at_another, looking_at_viewer, love_live!, love_live!_school_idol_project, multiple_girls, nishikino_maki, nishikino_maki's_mother, open_mouth, paper, pencil, piano, purple_camisole, purple_eyes, red_hair, reflection, shamakho, sheet_music, short_shorts, shorts, sitting, sitting_sideways, solo_focus, thighs, upright_piano, window