Mia is reincarnated into the world of her favorite fantasy novel.
She enjoys her second life as a count's daughter without being involved in the story.

"Because novels have happy endings, I mistakenly assumed that I would have one too..." Her

peaceful daily life, which she thought would last forever, suddenly falls apart when she gets engaged. Mia
is pinned down by her fiance Dewey's twin brother, Alec, and her body is dominated by pleasure that overcomes her revulsion.

"He told me it would be okay even if I did it. I could pass for my brother's child."

Unable to resist, she repeatedly has sex with Alec, betraying her fiance. Where will this lead her?

■Plot:
The younger brother steals the protagonist from his older brother (the protagonist is the one being cuckolded). There is little depiction of sexual activity with the brother. There is no threesome, but there is cuckolding play. Includes
forced sex, fingering, cunnilingus, squirting, fellatio, creampie, genital depictions, cross-sections, ahegao, moaning, hearts, and voiced moans.