Traveling Through the Apocalypse: Why Do You All Like Me?

[Traveling through the end of the world + beauty + different personalities + Shura field + super powers + rebuilding civilization] Traveling through the apocalypse, Nightmare thought he was the destined protagonist and was here to save the world. But after struggling for half his life, he realized something was wrong? Why do you feel like a pretty boy? The twin goddesses, one side angel and one side demon, are admired by countless people, but not only is the demon personality clinging to him, but even the angel personality is secretly in love with him. The sisters of Dragon Palace, one is gentle and the other is arrogant. The elder sister wants to marry him, but the younger sister firmly disagrees, saying that she hates him very much, but she is quietly approaching him behind his back. There is also the genius mecha girl, the peerless Valkyrie, the holy mother of the Holy See, the cold empress... Why do you all like me! Could it be said? Am I really the ultimate succubus?