Ranka and Sheryl's "What Bout My Star?" duet at the hospital. It's too cute to see the flustered look on Alto's face as the two girls who love him so much serenade him.
The picture of Michael and Klan as kids. They're both about 5-7 years old, and Michael is using the fifteen-foot-tall Klan as a swing set.
Special credit has to go to the end of The Wings of Goodbye... The Love Trianglefeatured as the trope pic on the main page is resolved after four years, in a heartbreaking fashion.
Alto Saotome: "Sheryl... Even though it may be too late, I love you."
Doubly so when you read the lyrics to the song "Sayonara no Tsubasa" and then realize that Sheryl wrote it during her time in prison. Even then, she still believed that her feelings would reach Alto and that he would respond in kind.