1girl, afloat, ahoge, artistic_error, blue_archive, breasts, demon_girl, demon_horns, demon_wings, forehead, hair_ornament, hairclip, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, kashuu_(pixiv_66328082), legs_up, lifebuoy, long_hair, looking_at_viewer, lying, name_tag, official_alternate_costume, old_school_swimsuit, on_back, one_side_up, parted_bangs, purple_eyes, school_swimsuit, sidelocks, sleeveless, small_breasts, solo, swimsuit, white_hair, wings