No. Her face is like that coz she has always suppressed her desires coz she thought dirty thoughts r wrong but when she finally fell in love with a guy(mc of the anime) she Lost it n became an SSS grade pervert.
https://myanimelist.net/anime/29786/Shimoneta_to_Iu_Gainen_ga_Sonzai_Shinai_Taikutsu_na_Sekai This is the anime.
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