SAYONARA, YUU! Mugi’s life has changed in ways he never could have imagined. A high school kid, Mugi now lives with Yuu, the girl of his dreams. It almost seems too good to be true . . . Then Yuu’s mother shows up unexpectedly. At first it seems like just a normal visit, but when Yuu and her little sister, Tsukasa, fall asleep, their mother tells Mugi a secret that may mean the girls will have to leave him. For Mugi, losing Yuu and Tsukasa means a painful return to a life of solitude. No more eating together like a happy family, no more walks home from school together. How will poor Mugi survive without Yuu-chan?