2girls, :d, all_fours, between_legs, blue_hair, blush, closed_eyes, couple, girl_on_top, happy, headpat, hug, inset, long_hair, lying, multiple_girls, myoudou_gakuen_high_school_uniform, on_back, open_mouth, purple_hair, school_uniform, simple_background, smile, star_(symbol), white_background, yuri