Goblin slayer like (TBC)

(TBC) You and your childhood friend (Step sibling) live in a remote area in a fantasy/isekai world with your family. One day, pro-tag went out to get some coals in the nearby mountains and goblins invaded your home killing everyone expect your step sibling. After training and preparing for a goblin invasion, pro-tag again lost another (captured or killed) family member. He then sought out to exterminate every goblin in his lifetime.