The aloof protagonist: a bookworm who is
deeply detached from the world he resides in. He has no interest in
others and is firmly convinced that nobody has any interest in him
either. His story begins when he stumbles across a handwritten book,
titled "Living with Dying." He soon identifies it as a secret diary
belonging to his popular, bubbly classmate Sakura Yamauchi. She then
confides in him about the pancreatic disease she is suffering from and
that her time left is finite. Only her family knows about her terminal
illness; not even her best friends are aware. Despite this revelation,
he shows zero sympathy for her plight, but caught in the waves of
Sakura's persistent buoyancy, he eventually concedes to accompanying her
for her remaining days.
As the pair of polar opposites interact, their connection strengthens,
interweaving through their choices made with each passing day. Her
apparent nonchalance and unpredictability disrupts the protagonist's
impassive flow of life, gradually opening his heart as he discovers and
embraces the true meaning of living.