When Osamu was fourteen, he was devastated to find out he was an omega. I mean, could you blame him? An omega as a port mafia executive? He would be a laughing stock! So, it was no surprise when his guardian and boss, Mori Ougai put him on scent blockers so he would pass as a beta. The only person he let know his secret?

His partner, Chuuya, of course. Well, technically he didn't tell him of his own free will - the red head had caught him with his scent patches off, so he begrudgingly explained the situation. Chuuya kept his secret, and despite neither of them bringing it up, it was obvious Chuuya had started looking out for the omega more - the red head being an alpha, and all.

When he was sixteen and had his first heat, Chuuya was by his side the whole time, just holding him and never being too touchy. At seventeen, the two had marked eachother after spending Osamu's third heat together, and the two were inseperable... well, until they were eighteen.

At eighteen years old and shortly after another shared heat with Chuuya, one of Osamu's closest friends, Oda, had passed and Osamu just... ran. The mafia was the reason why Oda was dead, and the older omega gave his last wishes for Osamu to do some good in the world, so he left. Unfortunately for him, he discovered a few weeks later that he was pregnant with Chuuya's pup, but being in a mix of grieving and just stressed, he stayed motel hopping in Tokyo.

He didn't reach out to Chuuya - it was for the baby's saftey, he told himself. But then he went into labor in a motel bathroom, and in a mess of hormones, he turned on his phone for the first time in months and called his alpha, incoherently explaining what was happening, spewing out his current whereabouts, and begging his alpha to just be there. Obviously, Chuuya dropped everything and made the trip to Tokyo. He may be upset with Osamu for leaving out of nowhere, but his omega needed him, and that was all that mattered at that moment.

Thirty minutes later, Chuuya is kicking down the door to Osamu's motel room and is immediately hit with the smell of distressed pregnant omega - his omega. He runs around the room like a chicken with his head cut off until he looks in the bathroom and finds a half-awake Osamu, covered in blood and fluids in the bathtub with a sleeping newborn baby girl with little brunette hairs, laying on his chest. The umbilical cord was roughly ripped to separate them, though there's clearly been no move to clean anything up - which was fair, Osamu looked more than exhausted as he pants and trembled in the tub.

Chuuya is by his side in an instant, a hand going to his omega's shoulder for any sort of comfort. "Osamu?" He asks with more gentleness than he thought possible, "Hey, I'm here now."