For the Sake of the Elves, I Can Even Kill the Devil.

In the light year 8095, Lin En was reincarnated into this world called "Neisser" full of swords and magic, and possessed an incredible talent called the Little Wish Technique. In the year 8101, Lin En, the son of a herbalist, did not inherit his parents' trust, but decided to become an adventurer and explore this continent. In the same year, he began to study with the elf sister in the town. In the year 8110, the Demon King's army began to sweep across the continent. In the same year, Lin En confessed to the elf sister whom she had always loved, but she was rejected on the grounds that the life spans were too different, and she was destined not to be with her for a long time. In the year 8111, Lin En learned that the Demon King's castle seemed to contain a potion that could make people immortal, and immediately embarked on a journey to the Demon King's Castle. … … … In the year 8128, the brave Lin En beheaded the Demon King. He is not perfect, his heart is not bright, and his starting point is not great, but as far as history is concerned, he is worthy of the name of a brave man.