1girl, ahoge, arm_behind_head, armpits, bed_sheet, blue_archive, breasts, covered_navel, demon_girl, demon_horns, demon_wings, forehead, groin, half-closed_eyes, halo, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, long_hair, looking_at_viewer, lying, name_tag, official_alternate_costume, old_school_swimsuit, on_back, one_side_up, parted_bangs, pillow, presenting_armpit, purple_eyes, ryo_(ryo_artys), school_swimsuit, sidelocks, simple_background, sleeveless, solo, swimsuit, wet, wet_clothes, wet_swimsuit, white_hair, wings