Sonic Channel staff on their blog:
It is Jet relaxing at a beach side, being struck by the summer’s sunlight.
Jet, who is fully enjoying the everlasting summer, suits the image of the southern countries, doesn’t he?
This time, there were answers of multiple characters like Wave, Amy, and Marine, but there were also many people answering “Jet” successfully from the boot and its design of the first hint.
About the decoration and setting, there were also people answering up to the kinds of beverages—“tropical juice” and “Blue Hawaii”—in addition to the summerlike answers—“vacation” and “beach chair.”