Bravery Ordeal - The Tale of a Human and Succubus's Child

The protagonist was born to a human father and a succubus mother.
His parents kept his half-human status a secret as he was raised as a human, until the night of his coming-of-age birthday, his mother was kidnapped by a mysterious succubus.
The protagonist takes on the “Trial of Courage” to get his precious mother back, and on the way, various succubus temptations await him… This is the story.