Now happily dating, 27-year-old Masamune Hanzawa takes his boyfriend, 19-year-old Natsuki, on a birthday trip, but he unfortunately spends the whole time worrying he hasn't...

Now happily dating, 27-year-old Masamune Hanzawa takes his boyfriend, 19-year-old Natsuki, on a birthday trip, but he unfortunately spends the whole time worrying he hasn't done enough. When they run into Natsuki's mom at the train station, she thanks Masamune for taking care of her husband and son. Inspired, they decide to come out to Natsuki's parents about their relationship. But in a world where same-sex relationships face societal resistance, how will Natsuki's family react? As love meets uncertainty, Masamune and Natsuki must navigate uncharted waters together.