The untold story of Hina's years of effort to mend the broken relationship with Sayo. The rift begins to close as they have one thing in common: guitar. Twin Star Concerto series sets in the same timeline as Daily Lives of Boppin' 2-A (they complement each other).

Class 2-A of Haneoka Girls' High School is the home of a fleeting air-headed prince, a genius idol with loose screws, and a normal girl who involuntarily becomes their mom. Daily Lives of Boppin' 2-A series sets in the same timeline as Twin Star Concerto (they complement each other).