2girls, ball, blue_sky, blush, breasts, brown_eyes, brown_hair, cloud, day, douki-chan_(douki-chan), fingernails, ganbare_douki-chan, holding, holding_racket, kouhai-chan_(douki-chan), large_breasts, lying, mole, mole_on_cheek, multiple_girls, on_stomach, one_eye_closed, open_mouth, racket, short_hair, sky, sleeveless, smile, sparkle, sportswear, standing, teeth, tennis, tennis_ball, tennis_racket, tennis_uniform, thighs, upper_teeth_only, yomu_(sgt_epper)