It starts with the main character on the battlefield on the verge of death trying to save his lover. He musters up the strength to defeat some soldiers and finds out she died and gives up and dies. He regrets his life and all the events that happened to him.
He is reincarnated as his younger self as a baby and through this second chance he tries to stop all the events that leads to his friends and family's deaths. He is skilled with magic and swordsmanship. He is not Ip from the start but has all memories and skills to get stronger. First he tries to save his village from the demon army that 16 years in the future I think. Also I think his father is the strongest swordsman or adventures.