The iDOLM@STER SideM: Wake Atte Mini! - Shoshi Kantetsu Daisouji!

Ken Yamamura begins sorting the mountain of costumes stored around 315 Production, and members of Shinsoku Ikkon and Legenders lend a hand. What should be a straightforward cleanup slows down whenever an old outfit brings back memories of a performance, an awkward moment, or how far the idols have come since wearing it.

With everyone becoming increasingly distracted by nostalgia, organizing the office turns into a warm look back at their shared history. The costumes may be ordinary work materials, but each one carries a piece of the experiences that shaped the idols standing there now.