Time Travel to a Horror Novel and Become a Supporting Character

Traveling back in time to a horror novel where a man and a woman team up to fight monsters, he is the hero's loyal little brother. But he is timid and he is afraid of his good brothers. In order to save his life, he decided to stay away from the male and female protagonists and live a normal life. But, later, he discovered... He who has yin and yang eyes can't live without the male protagonist... Crying and crying... Male protagonist, I was wrong... Lend me your thigh for a hug... Concept: sweet love