World Tour Arc／AREA 04: MELLOW DEAR US VS Valkyrie (MDU Focus)

NOTE: This is a partial translation of the event story, namely the MDU focused chapters.

Valkyrie is preparing themselves for a challenging live showdown against MELLOW DEAR US. However, Shu is concerned about Mika's distracted demeanor. Could Mashu and Mika actually have a "connection from the past" beneath it all...?