Social Media · TREASURE Era
Social Media — Pre-Debut Rainy Day Greeting
A pre-debut self-introduction message from Seonghwa posted via ATEEZ's official X account: "Hello~ this is ATEEZ's Seonghwa. It's raining, so be careful, eat well, don't get sick, and have a happy rest of the day."
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.