Shijou Saikyou Orc-San No Tanoshii Tanetsuke Harem Zukuri

Story:

Manga talks about the son of an orc and a human woman. In his native village, he was constantly bullied because of his mother's appearance. But one day he meets a beautiful elf, which awakens a hidden power in him. After that, he decides to become the strongest warrior in history and so create a harem for himself.