1girl, animal_ear_fluff, animal_ears, bad_pixiv_id, black_coat, black_hair, blue_archive, blue_necktie, blush, cat_ears, cat_girl, coat, grey_skirt, halo, id_card, long_hair, loose_necktie, mochizuki_riku, necktie, off_shoulder, open_mouth, plaid, plaid_skirt, red_eyes, ribbon, school_uniform, serika_(blue_archive), shirt, skirt, solo, sweat, twintails, very_long_hair, wet, wet_clothes, wet_shirt, white_shirt