Shiraishi Toby, a 4 years old boy who was supposed to accompany his mother in a business trip, 2 years after his father 'left' them, thus, handing the company to Ms. Akane, Toby's mother. However, their plan to go to America was changed after Toby met Kageyama Tobio who was in the same airport to fetch his girlfriend, Y/N L/N. Toby happens to mistaken Kageyama as his missing father. Resulting for the child to miss his flight and get stuck with the couple for two weeks until his mother returns from the business trip. Would Kageyama and Y/N be able to stand up as Toby's temporary parents?