phenomen a book

One hundred years have passed since the brave heroes of the kingdom defeated the powerful demon king, but in his final breath, the demon lord cast a curse on the heroes'''' party, granting them immortality. At first, they were thrilled to have been granted eternal life, but as the years went by, they soon discovered the true burden of living forever. As their mental health began to deteriorate, the once-beloved heroes decided to disband and live out their endless days in solitude.