Ryuhei Agawa is a 25-year-old soba restaurant owner who has been in love with his neighbor, Tamaki Murashibara since he was a child and is always dejected when Tamaki only sees him as a "younger brother". However, the appearance of a love rival starts to ignite Ryuhei, making him determined to end his unrequited love.

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.