1girl, alternate_costume, alto2019, bad_pixiv_id, bikini, blonde_hair, bow, breasts, cleavage, earrings, front-tie_top, hair_between_eyes, hat, jewelry, long_hair, looking_at_viewer, lying, navel, necklace, on_back, purple_bikini, purple_eyes, purple_sarong, sample_watermark, sarong, see-through, shirt, solo, swimsuit, tied_shirt, touhou, touhou_lost_word, very_long_hair, watermark, yakumo_yukari, yakumo_yukari_(boundary_of_sand_and_sea)