Omega Nicolo wasn't supposed to go to war but somehow disguised himself as a Beta, so he was able to go. He manages to hold up the ruse for years and Yusuf never suspects anything. Now though they are falling in love but Nicolo is at the same time pulling away from Yusuf because he is afraid to reveal himself as an omega. He likes the freedom he has when everyone thinks he is a beta and does not want to go back to being treated as an omega again. His heart would break if Yusuf started treating him like that.