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.<br><br>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...