Why, Charlie Brown, Why? (1990)

Plot

When a new girl joins their school, Linus instantly falls for her. However, his affection is soon overshadowed by her diagnosis of leukemia, requiring her to undergo treatment at the hospital. As she battles the challenges of chemotherapy, Linus and Charlie Brown rally around her, offering support and comfort during her tough times. Meanwhile, Snoopy takes on the role of an imaginary doctor, bringing lighthearted moments to their difficult journey.