1girl, all_fours, asahina_natsuki, blue_hair, collarbone, hairband, indoors, long_hair, long_sleeves, looking_at_viewer, mole, mole_under_mouth, open_mouth, photoshop_(medium), red_eyes, solo, spaghetti_strap, super_real_mahjong, sweater, tanaka_ryou, wooden_floor