The finalizing of the peace doesn't take that long. For the most part, the Uchiha hold soul bonds in high esteem, unlike the majority of the Senju. It's odd, how the Uchiha seem to expect Tobirama and Madara to just fall perfectly into each other's lives with little effort. What's stranger is how correct they seem to be. Tobirama ends up at the Uchiha Compound almost as much as he's in his own compound.
He learns his soulmate's habits and likes, dislikes and little oddities. He learns about Madara, not just the Uchiha clan head. He learns about Izuna and Togakushi and Kuro, about Hikaku and Kagami.
Admittedly, he may get a little... obsessed.
But he had waited far too long to care. He loves the feel of Madara's hair under his fingers, the friendly arguments he can tease from the man. Loving Madara and being in love with Madara are two very different things, however, and he keeps himself distant for all that he pulls secrets and hopes and dreams so gently from his soulmate. He refuses to allow the man any closer to him until their peace has been solidified, until a village stands between the Uchiha and Senju.
The Senju, he knows, have made the connection. There is no way for him to have found the way to his soulmate the conventional way but that in no way has tamed the whispers. Itama, at least, is sensible in his suspicions, for all that he will never know the exact truth.
They find themselves with an issue concerning the peace and the village.
The clan leadership on both sides are too young to partake in arranged marriages, even by shinobi standards. There is no one in high enough standing in either clan to be married off that will leave the Elder's content. Hashirama and Madara are only eighteen. Kuro and Togakushi are seventeen. Izuna is sixteen, Tobirama at fifteen himself. Kawarama is two years younger at thirteen. Itama, for all his intelligence and skill and burgeoning mokuton, is by far the youngest at ten years of age. Hikaku and Touka are similarly too young, though Touka is on the fence at twenty.
Tobirama puts an end to the considering looks the Elders give Touka with a few words, spoken airily for all that his chakra had been focused into a needle's point. Or, more accurately, a senbon's point.
Tobirama keeps the Senju Elders on a short leash as the village begins to take shape on the very Naka river where all this started so long ago between two optimistic eight year olds. Izuna, to his amusement, has taken to him like a fish to water although the boy, older by a year, is clearly more focused on Touka than on Tobirama himself.
Touka's increasingly exasperated and annoyed (and, through cause and effect, increasingly violent) rejections are endlessly amusing to watch.
He finds himself dreading the day Touka deems them both old enough, regardless of any humor he finds in the situation now.
More so, he finds Kuro's fascination with Hashirama, of all people, disconcerting.
He had told Mito of this development during her short visit and she had turned to him, chakra deadly serious for all that it was muffling her true amusement, and she had told him, in no uncertain terms, that she didn't mind it. Welcomed it, even.
The more the merrier, had been her words, and he had been reminded all at once of the Uzumaki's easy acceptance (and in some cases, encouragement) of polygamy. For all that he acknowledges and accepts relationships of that nature, his natural possessiveness made it impossible for him to understand them.
He had avoided Mito, Hashirama, and Kuro for the remainder of the princess' stay, unwilling to end up accidentally coming upon something that really shouldn't be come upon (not that he could cut his sensing off from them completely, as much as he had desperately wanted to).
Togakushi, thankfully, seems to be one of the few sane Uchiha. Madara is not included in that number precisely because he's Tobirama's soulmate. No one made perfectly for Tobirama, or for whom Tobirama is made perfectly for, could be completely stable, for a lack of a better descriptor. It'd simply be too boring.
And oh is Madara fun.