Dear Family

Nobumasa Tsuboi operates a modest factory in a quiet town, his world anchored by his daughter Yoshimi, who lives with a congenital heart defect. A doctor's grim prognosis—she may not live past twenty—shatters the family's fragile peace. Refusing to accept this fate, Nobumasa and his wife Yoko confront an impossible reality. With no medical background, the determined father embarks on a solitary, desperate quest, poring over textbooks and diagrams to understand artificial hearts, driven by a love that defies both time and science.