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It was an exciting time at the Senju compound. Hashirama and his wife, Mito, were going to have their first child. It was a sign of prosperous times for the clan and the village. Hashirama was over the moon with happiness, Mito was also happy, yet calmer about it.
Hashirama wasn’t the only Senju in a relationship, though. Touka Senju and Hikaku Uchiha had started dating not too long after peace was brokered between their clans. What was even more shocking was that Tobirama and Izuna became lovers and eventually married. Nothing else tied the two families closer than the marriage between the two clan heirs. Once again, Hashirama was overjoyed.
On the other hand, Madara was not so thrilled. He vehemently opposed the two pursuing a relationship, especially since he almost lost Izuna at the hands of Tobirama during the war. Once he realized he couldn’t prevent them from being together, he begrudgingly accepted their union. After all, nothing was more important to the Uchiha clan head than his otouto’s happiness. Though, that didn’t stop him from threatening to kill Tobirama and dance on his grave if he ever so much thought of harming Izuna.
Thankfully for Tobirama’s and Izuna’s sake, that never happened. They were very happy together. The end of the war, the establishment of Konohagakure, and the union of two formerly bitter rivals demonstrated that peace was truly possible.
~*~
Tobirama was too young and embroiled in fighting his clan’s war that he never noticed much of what happened with his mother during her pregnancies with his younger siblings. So, he watched Mito’s progressing pregnancy with interest. Though only from a scientific standpoint, of course! He observed how happy the prospect of having a child made his Anija and sister-in-law. He wished he had paid more attention when Kawarama and Itama were born. Maybe, if he had paid more attention from the very beginning, they wouldn’t have died.
When Izuna learned what Tobirama was thinking, he scolded him, telling him it wasn’t his fault and he shouldn’t blame himself. While he himself regretted what happened to his own siblings, he never blamed himself for something beyond his control. War was truly a terrible thing. Thanks to this new era of peace, no child should ever experience that again.
Tobirama took what Izuna said to heart and eventually stopped blaming himself. However, his interest in Anija’s and Mito’s child didn’t cease. He started to wonder what it would be like to have a child of his own. Would they take after him or Izuna? Would they be a perfect culmination of Senju and Uchiha? He’d never know because it was impossible for two men to have a child together. Or was it…?
~*~
“Izuna. I want us to have a child together.”
Izuna unceremoniously spat out the sake he was drinking and looked at his lover in shock. “Are-are you joking? You know it is physically impossible for us to have a child, right? What has come over you all of a sudden? Have you been spending too much time with that stupid tree? He must be filling your head with crazy notions of parenthood. I thought you were smarter than that!”
Tobirama sighed and shook his head. “You and I have been married for how long now? A year and a half? Plus, we’ve courted each other longer than that. I wish you would stop calling Anija a stupid tree.”
“Never. That will never happen.” Izuna stood firm, and Tobirama knew with how stubborn Izuna was, that it would never change.
“That aside, I know it is impossible for us to have a child normally, but I still want us to have one.”
“That’s fine and all, but how do you propose we do that?” Izuna raised his hands in the air dramatically. “Did you create some kind of weird ninjutsu that makes it possible for us to have kids?”
The look on Tobirama’s face was enough to give the raven-haired man pause. “Oh, no… You didn’t! Oh my gosh, you did! Tobirama, what were you thinking?! When were you going to run this by me?!”
“Right now,” Tobirama answered, stepping forward and taking Izuna’s hands in his. “I created a seal that will allow you to bear a child. It won’t change your anatomy and should be perfectly safe. I wouldn’t risk using a dangerous ninjutsu on you. Losing you would be the last thing I would ever want. I would love to have a child with you, but I won’t do this without your permission. If I want to have a child with my wife, so be it! What do you say?” He lifted one of Izuna’s hands to his lips and kissed it.
Izuna’s eyes drooped slightly as he enjoyed Tobirama’s ministrations. He shook himself out of it and moved his hand away from Tobirama’s lips but didn’t slip out of his grasp. “Why am I the wife having the kid?!”
Tobirama glanced down at his smaller significant other and smirked ever so slightly. “Can you create a seal for it?”
Izuna narrowed his eyes and pouted before looking away. “…You are sleeping on the couch tonight.” After a moment, he glanced to the side at Tobirama. “I would love to have a child with you….”
The next moment, Izuna found himself wrapped in Tobirama’s arms, lips locked in a passionate kiss. A kiss that Izuna melted into instantly and returned with equal fervor.
~*~
The seal was performed uneventfully. Tobirama used some of his and Izuna’s DNA when casting the jutsu so the child would indeed be theirs. Izuna didn’t notice much difference at first until he started getting these weird cravings and mood swings. His belly slowly started getting bigger too. He yelled at Tobirama as he remembered he was told his anatomy wouldn’t change. Tobirama assured him that was still true, but the baby needed to develop somewhere. He told Izuna he wouldn’t experience any other changes and that the baby would be born through the seal.
Thankfully Tobirama was right, and Izuna only had to cope with the cravings, mood swings, and enlarged belly until the pregnancy was over. Poor Madara was mortified over the whole thing, while Hashirama was thrilled over getting to be an uncle. Hashirama told his childhood friend, turned enemy, turned friend again, that once the baby was born, any mixed feelings he had would disappear. Madara didn’t hold his breath, but as long as Izuna was happy, he’d accept whatever his brother decided to do, even if it was something never done before.
~*~
Several months passed by, and Mito gave birth to a healthy baby boy. The celebrations continued as shortly after, Touka and Hikaku got married. Six weeks later, Izuna gave birth to his and Tobirama’s first child, a boy named Kagami. He had a head full of curly black hair. Curly hair was rare but not unheard of among the Uchiha and a little more common from the Senju side. Kagami’s eyes were a little different, however. While they were onyx like other Uchiha, they had a reddish tint. Izuna was concerned that the child was starting to manifest his Sharingan much too soon. Thankfully, Tobirama allayed Izuna’s fears by confirming that wasn’t the case. Their son just inherited characteristics from both his parent’s eyes.
Izuna and Tobirama loved their son immensely and gave him the world. Hashirama spoiled him rotten and bragged about how his son and nephew would become best friends. Madara didn’t want to admit it, but Hashirama was right. Once Kagami was born, it no longer mattered how he was born; Madara loved him all the same.
~*~
Izuna sat on the engawa outside his and Tobirama’s house, gently rocking little Kagami in his arms. He hummed him a lullaby his mother used to sing to him all those years ago that Madara continued once she passed. Originally, he had mixed feelings about being the one to bear their child, but he trusted Tobirama and was glad he did. Tobirama’s footsteps were soundless as he approached Izuna from behind. He didn’t want to wake their slumbering child.
“I knew you would make a wonderful mother just as you make a wonderful wife…” Tobirama mumbled against Izuna’s hair before he placed a kiss on Izuna’s head and Kagami’s.
“Ha, ha. Very funny. Do you want to sleep on the couch again tonight?” Izuna whispered quietly as Tobirama sat down next to him. He was just jesting, though. Tobirama rarely did anything that upset him enough to be exiled to the living room for the night. The two found it impossible to sleep without the other, and they had gotten used to having their toddler sleeping with them as well.
Tobirama looked down fondly at his son and gently stroked his chubby cheek with his finger. “I love him so much. And I love you.” He leaned over to kiss Izuna’s cheek, but Izuna quickly turned his head, so Tobirama ended up kissing his lips. Tobirama blushed slightly and turned away, earning a light chuckle from his lover. Even after all that time, Izuna still managed to surprise him.
“And I love you both, too.” Izuna sighed and leaned tiredly against Tobirama’s shoulder. “We have our own child. An heir to the Senju and Uchiha clans.”
Hashirama insisted that Kagami was an heir to the Senju and Uchiha clans as much as his and Mito’s son was. He declared that Tobirama was just as important to the Senju clan as he was, and Izuna was as important to the Uchiha as Madara was, as well. Since both families were united through peace and marriage, it only made sense that their children jointly inherited and upheld the clans. No one had the heart to argue with the Hokage; Izuna, Tobirama, Mito, and even Madara were more than happy to accept his proposal.
Tobirama tilted his head down to see that Izuna had dozed off and was snoring lightly, Kagami still nestled snuggly against his chest. The white-haired Senju-Uchiha smiled and kissed the top of Izuna’s head. “Yes, our child, our love, and our heir.”