"We did go looking for omegas," Izuna pointed out under his breath, staring down at his personal enemy. "Look me in the eyes and tell me you want Senju Tobirama for a wife," Madara replied just as quietly, a brief spark of amusement blooming at the shocked horror on his baby brother's face. -- Before he was forced to accompany a pack of rut-muddled idiots on a half-baked plan to kidnap omega brides for the good of the Uchiha clan, Madara hadn't given Hashirama's younger brother much thought. Tobirama was a Senju, and therefore the enemy; he, like Madara and Izuna, was sole survivor of his litter, and so to avoid being alone and therefore unmarriageable had ended up paired up with his older omega brother by default; he was a vicious opponent; he was a beta. He had to be a beta. Hashirama wasn't, and nobody would be brazen or stupid enough to bundle up two reproductive siblings in the same litter, right? ... Right?