Title: Let's Be a Family!!
Chiaki and Kazuma have been friends with their mutual friend Tomoe since childhood. Tomoe is a photographer who travels around the world, often in warzones and dangerous locations, documenting happenings around the globe. That causes their trio to often be broken apart, though Chiaki and Kazuma, as a romantic couple, don't mind waiting for her to return. They're just trying to determine the next step in their relationship when Tomoe announces she'll return to Japan. The two, excited to see their friend, go out to meet her. But what they find isn't the Tomoe they said goodbye to before.
Tomoe is pregnant. She's very pregnant.
Chiaki and Kazuma never expected their rambunctious friend to settle down with someone, much less have a child. As they pepper her with questions, she admits that she doesn't know who her child's father is, but she fully intends to raise her all the same. Chiaki and Kazuma are stunned but more than willing to support their friend on this new journey in life. The day comes when Tomoe gives birth to a little girl named Ayumi. To Chiaki and Kazuma's relief, Tomoe settles well into motherhood, and the trio of friends are all happy with how their lives are going.
That is until Tomoe comes to them crying, begging that the couple take her one-year-old daughter and raise her so she can go back out into the field. Chiaki and Kazuma are once again surprised, but seeing their dear friend Tomoe and her young daughter, they can't possibly say no. So begins a complete surprise for Chiaki and Kazuma. Not just as a couple but as fathers. Navigating a relationship is hard enough with two people, but what happens when you add a third?