I Thought I Was the Top [ABO]

Chu Nan was born to be a sharp blade in Shi Tu's hand, striking fear into foreign lands and keeping corrupt ministers in check.

He thought he could keep his love for Shi Tu a secret for the rest of his life. But when news arrived that Shi Tu was to be married, he launched a lone raid on the enemy camp and never came back.

After transmigrating, he became an Alpha. It was only natural for him to fall for a man, as long as that man was an Omega. The only trouble was, there was no Shi Tu in this world.

In his second year of high school, a transfer student joined his class. He had the same face as Shi Tu, was called by the same name, and, most importantly, was an Omega.

Theme: Life is short. Leave no regrets.