rin_ateria, rio_(blue_archive), year_2024, 1girl, alternate_costume, arm_up, bare_arms, bare_shoulders, bikini, black_bikini, black_hair, breasts, breasts_apart, bright_pupils, cameltoe, collarbone, hair_ornament, hair_spread_out, hairclip, halo, halterneck, hand_on_own_stomach, heavy_breathing, large_breasts, long_hair, looking_at_viewer, lying, navel, on_back, on_bed, parted_lips, pillow, red_eyes, skindentation, solo, stomach, string_bikini, swimsuit, thighs, underboob, very_long_hair, , blue_archive