Yume Nijino, a first year in the Song class, is suddenly chosen to form a unit with Yuzu Nikaidō, a member of S4, for the Autumn festival. Ako Saotome, a first year in the Drama class is also chosen. Both Yuzu and Ako are ready to perform however, Yume is having anxiety about failing on stage again...
歌組１年生・虹野ゆめは、とつぜん、Ｓ４のひとり二階堂ゆずから秋フェスのユニットメンバーにさそわれる。もう一人は、劇組１年生の早乙女あこ。やる気まんまんのゆず＆あこに対し、ゆめはまたステージでしっぱいしてしまうのではないかとふあんな気持ちでいっぱいで…。
