Son Jin-ah (19 Aug 2021). "전소민·박성훈·김윤슬·김강현·박하나, '희수' 캐스팅 확정" [Jeon So-min, Park Seong-hoon, Kim Yun-seul, Kim Kang-hyeon, and Park Hana confirmed casting for 'Hee-soo']. MK Sports (بالكورية). Naver. Archived from the original on 2021-11-02. Retrieved 2021-08-19.
Son Jin-ah (19 Aug 2021). "전소민·박성훈·김윤슬·김강현·박하나, '희수' 캐스팅 확정" [Jeon So-min, Park Seong-hoon, Kim Yun-seul, Kim Kang-hyeon, and Park Hana confirmed casting for 'Hee-soo']. MK Sports (بالكورية). Naver. Archived from the original on 2021-11-02. Retrieved 2021-08-19.