"There are so many things I've wanted in this house. So I've been under the illusion that I belong here." Hiro and Radical-san take off for their work retreat. While Hiro's gone, Mao and Daiki are all alone. Has it finally become time for these feelings that have been growing stronger and stronger to be revealed?! And what of the rebirth of the Nakamura home, which only waits for the return of little sister Hina? The bright yet sad story of two childhood friends with an age gap and their life together continues...