Demon slayer: Re-life

The story revolves around a young man called Licht, he and his best friend as a warrior sacrificed themselves for their kingdom to end a heartbreaking war. After saying goodbye to each other, both of them passed away but fate had something different for Licht. As he reincarnates into a teenager body. But the world, he reincarnated in was not like his previous world, this world was more dangerous, not to mention there were powerful demons that were hiding in the shadows waiting for a time to dominate the world. Can Licht survive in this world? will his past life as a supreme warrior be of any use in this world? can he counter or fight the powerful demons of this world? can he marry a beautiful wife? or make a ha...... Note: This is just fanfiction and the original work doesn't belong to me, its original series name is Demon Slayer, if you hadn't watched this, go give it a try. I don't own anything except oc. And the cover is also not mine it was taken from Pinterest, the owner is @creampeachlily2020, if the honourable creator wants me to remove it, I will do it gladly. ( This is my first time writing fanfiction and I am a newbie, so the reader who wants godly fanfic pls lower their expectation. English is also not my native, though I am still trying to learn it ) Thanks.