Yeosu has long been marketed through its night sea. What is more interesting in 2026 is the attempt to make that image participatory. On October 3, the city’s BamBam Festa spread a one-day program across Ungcheon Waterfront Park and Jangdo. The official notice listed an outdoor book lounge, a play zone and Dongbaek Movie Night at Ungcheon, while Jangdo hosted a candlelight concert. A separate tourism notice said the movie program used advance booking through the Yeosu-en app, with two sessions at 16:00 and 19:00, 80 advance places per session and 20 additional on-site seats, all free. That matters because it changes the role of the waterfront. Instead of treating the night sea as a backdrop for a single viewpoint, the city programmed reading, film and live music into the evening. Other official 2026 initiatives point in the same direction: night-stamp programs connect several waterfront zones, and separate island-night outings extend some night-tourism activity beyond the central shoreline. This does not prove that Yeosu has created a seamless night route for international visitors. The practical layers are still uneven. We have not tested foreign-language registration in the Yeosu-en app, weather or wind cancellation rules, continuous step-free movement between all program areas, or the easiest late-evening transfer between Ungcheon and Jangdo. For readers, the useful conclusion is narrower: Yeosu is actively experimenting with ways to make its night sea an activity rather than only a photograph. BamBam Festa is a clear dated example, and it is more accurate to treat it as a temporary program inside a broader city strategy than as a permanent attraction.