mochizuki_riku, serika_(blue_archive), serika_(swimsuit)_(blue_archive), year_2024, 1girl, animal_ear_fluff, animal_ears, bare_arms, bare_shoulders, bed_sheet, bikini, black_bikini, black_hair, blush, breasts, cat_ears, closed_mouth, collarbone, cowboy_shot, frilled_bikini, frills, hair_between_eyes, hair_ornament, halo, long_hair, looking_at_viewer, lying, navel, on_back, panties, panty_pull, pink_eyes, small_breasts, solo, stomach, swimsuit, thighs, twintails, underwear, very_long_hair, absurdres, highres, blue_archive