Meet Nao and Ai, a couple that has been dating since their university days. The legalization of same-sex marriage spurs them into taking the next step and formalizing their union, along with adopting Hiro, a newborn baby boy. See how these two polar opposites handle sleepless nights, sending Hiro off to his first day of preschool, and managing relationships with other parents. They may even find that being a parent to Hiro teaches them more about themselves than they could have ever imagined...