I Became the Fiancé of the Heroine in a Female-Oriented Novel

I Became the Fiancé of the Heroine in a Female-Oriented Novel

A C-rank hunter who was the best in swordsmanship but couldn’t surpass his limits enters a fantasy novel. But why, of all things, did he end up as the heroine’s fiancé, a character made just to be the scapegoat in a female-oriented novel?