Lancer of Sun

After war has ended Naruto released Kurumi from seal and has returned to Konoha along with Minato, Kushina, his siblings Menma and Narumi, Jiraiya and Tsunade. Everyone thought that peace would finally appear in Elemental Nations. In Konoha everything returned to how it was before. Naruto, even if he brought peace, was forgotten and unappreciated while Menma and Sasuke were celebrated as heroes even if they didn't defeat Kaguya. After one year, Naruto wanted to admit his feelings towards Kurumi, but his heart was broken when he saw her with Menma kissing. But there was one secret that Naruto has hidden from everyone. He was reincarnation of strong demigod from other dimension who was born from god of sun and mortal woman. He introduced himself as Karna. Naruto met him when he was still just a child and trained with him every day until Karna fused with him. Naruto swore to himself that he won't rely on Karna's abilities to defeat his enemies. Instead he will only use abilities he masters during his life. And back to current situation, Naruto decided that he will leave Shinobi world and go to dimension where Karna is from, since nobody appreciated him. He did that and some time later he will enter certain Holy Grail War.