4girls, blonde_hair, blue_hair, chibi, cover, cover_page, doujin_cover, finger_to_mouth, hair_ribbon, long_hair, multiple_girls, outstretched_hand, pink_eyes, pink_hair, ponytail, red_eyes, red_hair, ribbon, school_swimsuit, school_uniform, serafuku, swimsuit, swimsuit_under_clothes, twintails