The world was shitty.
Dazai came to that realization when he reached his two hundred years of being alive.
His body was full of scars, of things that could have killed him if not being immortal and of actions he himself caused to achieve his death.
It was unfair, why did that God had to grant him such curse? The asshole said it as a blessing, but it was the worst curse a human can experiment.
He was alone. No matter how much he grew to love someone, that person always died in from him or got away from him when they realized his dreadful ability.
Dazai saw humans commit atrocities, he saw humans do miracles and he saw humans in their most crude reality.
He knew both the good and the bad part of humanity, but he didn't feel as if he belonged to it.
Being immortal gave you much free time, and it made you intelligent too. He experimented changes, the second world war happened in front of his eyes, he was everything. The man had ten degrees too, the most difficult ones, he knew ten languages perfectly and he has been to every country to ever exist, yet nothing satisfied him.
Raw but real.
That is until he found you at least.
One lost soul wandering around Paris on a rainy night. Well, how eventful.
He grew to see you as a friend, even though he knew you would leave. Just... How could he not see you as a friend went you seemed just as lost as him?
The world has developed to know how to use magic, create robots and do dozen of things that would seem imposible in- for example; 2020.
Well, he found comfort in you, a mere mortal that would die.
Of course, his ability remained hidden to you, and it will keep being hidden.
"Hm..." The man hummed as he stares at the sky above you two, feeling the cold floor of the rooftop under his back, arms behind his head.
"What do we even mean to the stars above us?" He asks you idly, raising a hand as if to touch said orbs.
Just how unfortunate he was, being unable to reach them.