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The protagonist is an otaku who decides to attend a doujinshi convention (likely Comiket) to buy limited-edition books. He chooses to go without telling his wife, fearing she would disapprove or stop him.
圧倒的肉感美を描く肉アツ熱ケツ作家・みな本が描く人妻NTRコミックが待望のOVA化！ The Movie Database
Then, gameplay mechanics in detail. Maybe a section on decision points where choices lead to different outcomes. Like, whether to fight immediately or find a strategy, or how to build a relationship with Misaki. Also, how to progress through the story using the Demon-Slaying Blade, which has stats like attack boost and a counter gauge.