Koyori went to her old friend Hijiri's place to drink after her breakup and stayed with him overnight. Hijiri confesses his feelings to her, and she is unsure. Now her ex wants her back. Before she loses everything, Koyori must decide.

The series will depict the trial and error and growth of the five members as a whole, as well as introduce a number of previously unreleased footage. In the long interviews with each member, previously untold "episodes only the members themselves know" will be revealed one after another.