1girl, animal_ears, beach, bikini, black_bikini, blue_archive, blue_ribbon, cat_ears, day, frills, halo, looking_at_viewer, off-shoulder_bikini, off_shoulder, official_alternate_costume, outdoors, red_eyes, ribbon, serika_(blue_archive), serika_(swimsuit)_(blue_archive), solo, spaghetti_strap, stomach, swimsuit, thighs, twintails, yato_(yama0x1)