Three Days of Happiness is a deeply emotional Japanese novel written by Sugaru Miaki.
The story explores the value of life, time, and happiness through a unique concept: selling one’s remaining lifespan in exchange for money.

The novel follows a young man who, feeling hopeless and empty, sells most of his future life and is left with only three days to live. During these final days, he begins to understand the true meaning of happiness, love, regret, and human connection.

This book is short but powerful, leaving a lasting impact on the reader’s heart and mind.