Social Media · TREASURE Era
Social Media — Wink to ATINY
A casual photo post of Seonghwa winking at ATINY, shared via ATEEZ's official X account and tagged #성화.
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.