Kamigami: Mottomo Yowaki Hangyakusha, Isekai Cheat Yuusha wo Utsu

Synopsis

Young Cobald returns from the mountains, but finds someone burning his village and killing all his family, friends, and even his fiancée. It was Kojo Itsumi, a brave man in absolutely invincible armour, summoned from another world. Cobald dies and screams that he will take revenge on the brave man who took away everyone he loved. The answer to his cry was Saria, a goddess who is mocked as an abandoned goddess in heaven. The two of them challenge the battle between the demon king and the hero. This is the story of a monster intent on revenge on the hero who has robbed him of his family and loved ones!