Tensegrity

Born as a beta man, Jun-Kyung thought he would die and live a normal life until he suddenly manifested as an Omega. After living a life that changed all over the place in a day, he gave up ju-do, which was like life, and became the exclusive bodyguard for a wealthy family.
Still he thought he was going to die living a quiet life until he had an accident with his employer's son.
No, it wasn't until he found out he was pregnant.
"Is there anyone other than us who knows this?"
Even before accepting the fact that he was pregnant, the other person calmly proposed to him as if he was offering a glass of water.
"Jun-kyung Ho, let's get married."
The problem was the person who proposed marriage was the older brother, not the child's biological father. Jun-kyung's life which was just normal become intertwined with him and turns into a drama overnight.

All credits go to the author as I am just a translator doing it for fun. Do not repost. Some words and meaning may be changed or omitted to fit the context better.