When Jungkook's babysitter needs to go back to her hometown for a few months, the billionaire is in a rush to find another babysitter before she leaves. Because of his distrustful nature, the search seems to be futile until his babysitter steps forward to recommend someone-her grandson, Taehyung. Taehyung is grateful when he finds a new job and he makes a list of things he needs to do in order to not lose this opportunity. But not falling in love with a married man, in a perfect marriage, with his perfect family is not something he had thought to mention on the list. But maybe past the careful glass ceiling of perfection, he finds a crack. And he dives headfirst into in.