4 years of our lives

"In 4 years I'll be dead, so what's it matter." Is the excuse ty Joseph Quartet would use for many reasons. "I only have 4 years to live too, let's be friends." Was the things that Elizabeth Hellsing told him, after that they were known as dead friends walking. But what will happen when they start to have more then just a friendly bond. Even when they know that in 4 years they'll be in the same hospital dying.