005 [ s = ㅅ ] '사' pronunced 'sa'

Korean is divided into consonants and vowels.
consonant : ㄱㄴㄷㄹㅁㅂ ㅅ ㅇㅈㅊㅋㅌㅍㅎ
vowels : ㅏ ㅑㅓㅕㅗㅛㅜㅠㅡㅣ

The seventh consonant 'ㅅ' sounds like 's' and the first vowels 'ㅏ' sounds like 'a'.
Two letters be combined to become '사' sounds like 'sa'.

Same pronunciation as 'Sa(사)udi Arabia'

[Source] https://pixabay.com/vectors/borders-country-flag-geography-map-2099223/

When it comes to K-Pop,
'사나(Sana)' is one of three Japanese members of the South Korean girl group Twice.
And this blog highly recommend this video clip to see how beautiful she is.
https://youtu.be/MA5J0Fk-J80

When it comes to movie,
'사바하(svaha)' is a 2019 South Korean mystery thriller film starring Lee Jung-jae who has become the first Asian star to win the Emmy award for best male actor in a drama.

[Source] https://ko.wikipedia.org/wiki/%EC%82%AC%EB%B0%94%ED%95%98#/media/%ED%8C%8C%EC%9D%BC:%EC%82%AC%EB%B0%94%ED%95%98_%ED%8F%AC%EC%8A%A4%ED%84%B0.jpg

https://youtu.be/hx2wUzYh5EE