Below the bottom panel with that "continuation" of their legs suggests an alternate last panel where they were dejectedly holding their instruments slack at their sides. That's a surprising editing slip.
Oyashio Kai-II releasedCongrats, Oyashio!Look at me, Kuroshio! I've reached Kai Ni!Ooh, brilliant. Wanna go for a sortie to break in your new rigging?Oh, how about we come along-Of course! Just you and me!