Social Media · TREASURE Era
Social Media — 100 Days Since Debut
A message from Seonghwa posted via ATEEZ's official X account marking 100 days since debut: "Say My Name Seonghwa VS Hala Hala Seonghwa — whichever Seonghwa, happy 100 days, ATINY."
Official Sources
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Era Context
TREASURE Era · 2018 – 2019
The debut chapter. Seonghwa steps forward as a founding member of ATEEZ, establishing his stage presence and vocal identity across the group's earliest title tracks, showcases, and early international promotions.