Partim

Ale, the 'Incarnation of an ancient saint', 'An angel', 'The right hand of God', he goes by many names within the people of his duchy. 
And just like those names suggests, he's a kind, understanding, smart yet down to earth soul, someone you'd look for in times of despair.He was like a Messiah, an example for others to look up to. And he achieved all that within three years. Before that, nobody even acknowledged his existence. 
Now, you may ask what could've happened three years ago that changed him like this, which gave birth to this hero. To answer your question, it's 'death'. He died. 
Not three years ago but twenty years into the future. He died twenty years later in the future and then came back to the past, to the beginning of everything, to a time where nothing had gone wrong. 
He lived a miserable life and died a miserable death. All he wanted was to do was help people and be a good person, but what he received in return was a world of pain, the death of his loved ones and the title of 'The betrayer of humanity'.  It was him against the entire world, a life full of misunderstanding. Yet, all he did was helping a wounded soul. He received all that for helping someone he shouldn't have, for befriending someone he should've killed at first site. He befriended a demon. 
But it was all in the past now. The future he experienced no longer existed. The naïve young master was no longer there. The Ale of present was a person with knowledge, experience and skill unlike no other. 
And this time, he wasn't going to repeat the mistakes of his past anymore. He wasn't going to walk a road of ignorance and foolishness. 
This time, what path will he choose?
In this second chance, what mistakes will he undo and what enemies will he need to deal with?
Will he be able to save his loved ones in this life?
And in the end, what will happen to Ale, this man full of unseen scars and wounds? Will he actually be able to heal?

Re : Life

After Ale used his healing powers to treat his own injuries, his first concern was the well-being of the demon he was riding.

Xion really was okay. Just like the last time when Ale used his area heal inside the cave, Xion showed no reaction to his power at all.

Normally, using light attribute would cause not only physical but also mental damage to the demons. They'd go crazy, berserk and lose their mind completely in case of long exposure.

It was even worse for healers. Using heal on demons was the same as using curse on humans. Their flesh and bone would burn and melt till there'd be no trace of them left anymore.

The only reason the humans couldn't use the healers to deal with the demons was because they were extremely weak, physically. Since they couldn't weild a weapon or protect themselves, they couldn't be used in war either.

Burning Village