A collaboration between Marshmallow 3d+, an idol group you can go and grope right now, and Vivian! One day, one month before an important live performance... The Vivian staff were following the members as they held a training camp and aimed for further progress, when Yuri Shinomiya made a shocking statement... "I'm thinking of quitting Marshmallow after our next live performance." With one month left until the live performance... Each member's thoughts well up in the midst of doubt and anguish. Vivian takes on a real yuri documentary!