Rin personally takes a hand in getting Kouki to stop acting up in school. Masako begins to show signs of emotional stress.; A chance meeting at the grave of Daikichi's grandfather gives Masako her first look at Rin in four years.; Keeping a family ritual, Daikichi and Rin plant a tree in the back yard to commemorate Rin's first day of school. Later, Daikichi researches whether his grandfather planted a tree commemorating Rin's birth.; It's Rin's first day of school and Daikichi is more nervous than she is.; One of the temporary employees at Daikichi's job begins to come on to him.; Kouki invites himself and his mother over for dinner and Daikichi, under pressure from Rin, accepts.