Hanabie 花冷え。 Today's Good Day & So Epic (The EPIC ENCORE) Asia Tour KITEC - Hong Kong Some scenes were filmed vertical for mobile devices/ Social Media.
They were a warm-up for WSS and it was their first show with them. I'm guessing they ended a little early and could fill their time but hadn't planned an Encore per se. It's a solid ending song. Also thinking for back-tracking and tech, it's easier to reset to that song than pull something new or unprepared.