Eden

The world's last functioning metropolis is ravaged by a perpetual downpour from a polluted sky. Within it, Akio Yowamushi escapes through his addiction: The Haven System; a computerized utopia that houses the mysterious Girl in the Garden. But when Akio begins experiencing visions of the Girl in distress in the real world, he finds that there's nothing he won't do to protect his vice, and the woman he loves deep inside it.