From NetFlix:

At the onset of the Spanish Civil War, a sheltered boy (Manuel Lozano) in rural northern Spain forms an indelible bond with his kindly leftist teacher (Fernando Fernán Gómez), who imparts his love for nature to the young student. Director Jose Luis Cuerda gentle and nostalgic drama, based on the short stories of Manuel Rivas, was nominated for 13 Goya Awards (the Spanish Oscar), winning for Best Adapted Screenplay.

Beautiful, sad story of friendship between young boy and devoted teacher at time of Spanish civil war. Inspired by a book called “La Lengua de las Mariposas” (Butterfly’s Tongue). Shows the destructive split in Spanish society during the Spanish Civil War. The ending could be hard to take. But I call this a “feel good” because the interplay between the boy and the teacher is beautiful. Really a masterpiece.